Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b3128a79aa8865…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 13:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b3c925a956c55ce73ea6cee47043e0aa SHA-1: b3eebe53af448d5d778a3b313fe446b7769f9a87 SHA-256: 02b3128a79aa88656364275d82d906d9d06f67b538b31125d4f09b2ddb7727ff
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains numerous embedded URIs, many pointing to disposable domains and some directly to IP addresses, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of 'cmd.com' in the document text suggests potential command execution, possibly via embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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 http://c2ctrading.org/cms_upload/files/boduseduzilufatebu.pdf In PDF document text
    • http://eia-edu.com/userfiles/file/37478338535.pdfIn PDF document text
    • http://qdcmd.com/data/files/nonuwaritofemex.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/lidogotazo.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/76961989231.pdfIn macro / runtime command snippet
    • http://guerrazzi.info/userfiles/files/53349299145.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1869528588.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/mununigelogiviv.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/9917484780.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/jobudabojolaxi.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/suzumod.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/87636945493.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/dipesapodasaguto.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/tilutubokisusiziso.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/13793104334.pdfPDF link annotation
    • http://syuncyoku.jp/upload/file/99936353325.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/28298624723.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/joselefebeni.pdfIn PDF document text
    • http://jobsandhi.com/In macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=horror+themes+for+androidPDF 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_off0000d0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DF 20512 bytes
SHA-256: 08276be6387d55639345a959312fe84248416734a3131c74396b4c6a834fe407
font_02_sfnt_off00011f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F59 10564 bytes
SHA-256: 3fe2a98814c9b75dcfa084c51bd8cfbf0e0bebf26976b9bbca9b535eb9677de4