Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee4581d070a364d…

MALICIOUS

PDF

111.2 KB Created: 2021-09-08 23:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6463ec016de7ab3becf67189b423e819 SHA-1: 6a59f543967211bae353e46d50b603a9a2726d7b SHA-256: 2ee4581d070a364d3d177b39a4edcf4f2d9df6c461210728ff00bed2f86a0223
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a lure to download a file and instructs the user to copy/paste content into a shell, indicating an attempt to trick the user into executing a malicious payload. The ML classifier and ClamAV detection strongly support its malicious nature. Several URLs point to potentially compromised or disposable hosting, suggesting a distribution mechanism for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/linofukolefox.pdf In PDF document text
    • http://ed-union05.ru/files/file/zosojozufaze.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/baromigutisiteresufujon.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/gofuk.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/10f00b895c230394b51459bc6f2502c1/89859089864.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/19165400201.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-6/20210906155444781464.pdfIn PDF document text
    • http://pate4me.com/userfiles/file/mukanagesaluri.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/94792506804.pdfIn PDF document text
    • https://korankertas.com/contents/files/sevede.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/7085972776.pdfIn PDF document text
    • http://wohntraumgmbh.at/16449222896.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/50247860417.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/38366067465.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/64592931283.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-6/20210906093700629452.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/tenijaderaj.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612f79a5114a9---24366413741.pdfIn PDF document text
    • https://onlinendttraining.com/files/68596757815.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/93661947338.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/godafojezitu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/1716f822b5b8e5c8554a2ccdfbf6aacd/58820563524.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/61156985743.pdfIn PDF document text
    • http://novichiha.ru/pic/file/82160379073.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/c862401bda609d6aa09d827e2d537e52/24134811618.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109070422173799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=download+windows+10+pro+1909+64+bit+isoPDF link annotation
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F0B 20284 bytes
SHA-256: 708472c9e3fec22fd2e6ff10f26cd9f2acd596100e94430e2a3c39e3072de207
font_02_sfnt_off00019502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19502 11068 bytes
SHA-256: 01f8378116309c3d49e361c0504e15ab59570d8fd0024075003feb89110e7994