Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca83eaa0248a484…

MALICIOUS

PDF

49.6 KB Created: 2021-04-05 09:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1f40cd9e0b0d5df7526cd7ff38fd1104 SHA-1: a6d54142790e88cd4d6cd915267bcd648b7fbdbc SHA-256: 5ca83eaa0248a4848ca69f3752887ad2c07ebc42a4503c7c9e49af918e111eb2
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7603

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • 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://baarspo.ru/aws?utm_term=roland+spd+sx+manual+en+espa%25C3%25B1ol PDF link annotation
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    • https://ximazaka.weebly.com/uploads/1/3/2/7/132712593/neserisuj.pdfIn PDF document text
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    • http://timinome.getenjoyment.net/how_to_add_memory_to_lenovo_t430.pdfIn PDF document text
    • https://juniverobov.weebly.com/uploads/1/3/5/3/135317499/kugaxasafeduwumumo.pdfIn PDF document text
    • http://bidilud.rf.gd/dr_phil_website_personality_test.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/sifepemorovupozabupi.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/do_you_get_a_formula_sheet_on_the_sat_physics.pdfIn PDF document text
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    • http://funuduki.rf.gd/2015_chevrolet_impala_lt_owners_manual.pdfIn PDF document text
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