Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29b738db7e27ca8…

MALICIOUS

PDF

41.0 KB Created: 2021-04-09 13:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ba102da0fd98db6a220227050c871977 SHA-1: 82f8e3e07efb20a04c8bb1e8437f533a1a19d054 SHA-256: a29b738db7e27ca8b313c93092743929504ac403cb3e1d21fe688f945cbb2bce
124 Risk Score

Malware Insights

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

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 0.6070

Heuristics 4

  • 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 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://www.mothercare.ro/sites/default/files/webform/resumes/77861868930.pdf In PDF document text
    • http://cicatsalud.com/html/sites/default/files/webform/dozigax.pdfIn PDF document text
    • https://www.blplegal.com/sites/default/files/webform/80507347088.pdfIn PDF document text
    • https://www.jsif.org/sites/default/files/webform/vinuriruxelapaviwona.pdfIn PDF document text
    • http://www.guninetwork.org/system/files/webform/heirri_proposals/dagen.pdfIn PDF document text
    • http://www.friendlycc.com/sites/default/files/webform/kilolegejesap.pdfIn PDF document text
    • https://www.enwidth.com/sites/default/files/webform/resumes/sojinikud.pdfIn PDF document text
    • https://www.enwidth.com/sites/default/files/webform/resumes/ralivowu.pdfIn PDF document text
    • https://ambrose.edu/sites/default/files/webform/28695523124.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=tableau+centaine+dizaine+unit%25C3%25A9PDF link annotation
    • https://community.princeton.edu/system/files/webform/xakefabobadu.pdfIn PDF document text

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