Malicious PDF — malware analysis report

Static analysis result for SHA-256 321da5c07aaf3980…

MALICIOUS

PDF

101.3 KB Created: 2021-02-25 11:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a2a725dfa9e5c19c39991a3d539218a9 SHA-1: 52b8dd778f832dcf7119dbbbcaa97e5048adefeb SHA-256: 321da5c07aaf3980bf248f140d74ab4e8781d770d05867fc31d8d4041863d3b7
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 0.8914

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://bologen.ru/award?keyword=how+to+determine+a+rocks+hardness PDF link annotation
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/gosebavowekox_xotuzeturofe_rozima.pdfIn PDF document text
    • http://znohist.site/77211885696m1i13.pdfIn PDF document text
    • http://gonzo-3d.com/53503123868xqwsr.pdfIn PDF document text
    • https://vedalamiru.weebly.com/uploads/1/3/0/7/130776143/97a08822152304f.pdfIn PDF document text
    • https://jeluvuxibobuna.weebly.com/uploads/1/3/4/0/134017570/cfc5aea22.pdfIn PDF document text
    • http://my-favshopg.online/13559984160h3ech.pdfIn PDF document text
    • https://voviteri.weebly.com/uploads/1/3/4/9/134904749/1401940.pdfIn PDF document text
    • https://sowekunozo.weebly.com/uploads/1/3/5/3/135321923/jugesekibafifed.pdfIn PDF document text
    • https://sugelama.weebly.com/uploads/1/3/4/8/134898925/vigasowisatod.pdfIn PDF document text
    • https://vulakesekek.weebly.com/uploads/1/3/1/4/131438428/witiraxiru_debelal.pdfIn PDF document text
    • https://mufewikusa.weebly.com/uploads/1/3/4/0/134042586/3722022.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/tutin.pdfIn PDF document text
    • https://xazonidunigi.weebly.com/uploads/1/3/4/5/134590253/lisodamuxate.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/the_rising_of_the_shield_hero_season_2_release_date_anime.pdfIn PDF document text

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