Malicious PDF — malware analysis report

Static analysis result for SHA-256 398ba70a527c838d…

MALICIOUS

PDF

53.4 KB Created: 2021-01-08 19:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 92aa8be6b5f9e53477ea736c1c987af6 SHA-1: 1ddd5f7e3bb6a447552c3afc645d0644dc430742 SHA-256: 398ba70a527c838df3ca686fd41059c3b30856b1d1aa13eb8f47d44a03a1229a
184 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.5911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/wb?keyword=storyart%20premium%20apk%20unlocked PDF link annotation
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/dasixajuvel.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/gdohg3C/hatsune_miku_offline_music_video.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/370674.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454824/normal_5feba745ee3ce.pdfIn PDF document text
    • https://kotafogora.weebly.com/uploads/1/3/4/3/134322717/vunikigiwudigizosug.pdfIn PDF document text
    • https://biroputasore.weebly.com/uploads/1/3/4/7/134747039/leniviwobizuju-pazeregogow.pdfIn PDF document text
    • https://laforefuje.weebly.com/uploads/1/3/5/3/135333455/cc9e9fa918c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_5fc35c0a7e860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_5fe6c416ef40a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380675/normal_5fe4a3abd96bd.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/gfpaKHS/kpop_boy_groups_with_8_members.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/iYIhf1o/kewidudasaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375702/normal_5fe17a38510eb.pdfIn PDF document text

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