Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0d0184b11a3703…

MALICIOUS

PDF

33.8 KB Created: 2020-10-28 21:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2599115d6d272959acf6d1318fc0ed9a SHA-1: dff712d31bfddd4ccf98129be8da0ea3f66d6a7f SHA-256: 3e0d0184b11a3703055973c21133a07d028766c73d7c1ba99c929577837b95d8
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF contains an embedded script and numerous links, including one to a known malicious redirector at https://cctraff.ru/123?keyword=learn+powershell+in+a+month+of+lunches+pdf. The embedded script and the document body text, which mentions 'Learn powershell in a month of lunches pdf', suggest a lure to trick users into clicking the malicious link, likely to download a second-stage payload. The presence of an embedded script payload and malicious redirector link strongly indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/123?keyword=learn+powershell+in+a+month+of+lunches+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5f94ce60ca6db.pdfIn macro / runtime command snippet
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f8d077a89603.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zuram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f8ff7f864d93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5f9839e5a22e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f8b76477a0b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_5f93d47332eb6.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/judate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5f94401649567.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/meziletawepal_sonob_waroxar_modudedegiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_5f8e1b6c8d0a8.pdfIn PDF document text
    • https://dikanutedageke.weebly.com/uploads/1/3/4/4/134457663/fesimibuvewabi-kopaj-kutarobolukuper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f8f0152b2041.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1621/4439/files/8th_grade_spelling_words_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8250/9213/files/aarti_sangrah_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4972/9191/files/lubidimime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7767/1322/files/godaddy_mail_server_settings_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4198/0067/files/sm_seaside_cinema_movie_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://cdn.shopify.comIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_000081e4.bin pdf-embedded-script PDF raw stream script payload at offset 0x81E4 1629 bytes
SHA-256: 8c1a60167febce6cb3a04c70d276d6f336f51a8ecd431205e498caf8be3bf31a
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 5 shell/COM execution token(s).
Preview script
First 1,000 lines of the extracted script
<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?>
<x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='pdf-parser'>
<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'>

 <rdf:Description rdf:about=''
  xmlns:dc='http://purl.org/dc/elements/1.1/'
  dc:format='application/pdf'>
  <dc:creator>
   <rdf:Seq>
    <rdf:li>Pekixahadu Zalegi</rdf:li>
   </rdf:Seq>
  </dc:creator>
  <dc:description>
   <rdf:Alt>
    <rdf:li xml:lang='x-default'>Learn powershell in a month of lunches pdf. The only book you need to read to start using it in your daily work. If you need to learn PowerShell</rdf:li>
   </rdf:Alt>
  </dc:description>
  <dc:subject>
   <rdf:Bag>
    <rdf:li>Learn powershell in a month of lunches pdf. The only book you need to read to start using it in your daily work. If you need to learn PowerShell</rdf:li>
   </rdf:Bag>
  </dc:subject>
  <dc:title>
   <rdf:Alt>
    <rdf:li xml:lang='x-default'>Learn powershell in a month of lunches pdf</rdf:li>
   </rdf:Alt>
  </dc:title>
 </rdf:Description>

 <rdf:Description rdf:about=''
  xmlns:pdf='http://ns.adobe.com/pdf/1.3/'
  pdf:Producer='pdf-parser'/>

 <rdf:Description rdf:about=''
  xmlns:xmp='http://ns.adobe.com/xap/1.0/'
  xmp:CreateDate='2020-04-14T23:40:07'
  xmp:CreatorTool='pdf-parser'/>

 <rdf:Description rdf:about=''
  xmlns:xmpMM='http://ns.adobe.com/xap/1.0/mm/'
  xmpMM:DocumentID='90e07609-cd2b-46ae-aad5-f74a0734db83'
  xmpMM:InstanceID='f54cbd1b-d3cc-4210-b1fb-af796040c269'/>

 <rdf:Description rdf:about=''
  xmlns:xmpRights='http://ns.adobe.com/xap/1.0/rights/'
  xmpRights:Marked='True'/>
</rdf:RDF>
</x:xmpmeta>
<?xpacket end='w'?>
font_00_sfnt_off000048ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48EA 5428 bytes
SHA-256: d2c14bc597d9cf3209f7bf6f88779981ae3b4e115e3730c6bbcb89290aa330a0
font_01_sfnt_off00005b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4E 9100 bytes
SHA-256: 97eb1bf5d5010bda2d11f850b5021e0e7e2951a7c7ccaae1f675b7258adccccf

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