Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b65f02f851dc7c…

MALICIOUS

PDF

52.6 KB Created: 2021-01-10 09:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10ce6c1dfc12d395b5ad7287a04cea90 SHA-1: de03bcc8fdf76dcc9c64031934580a5be7d3eecf SHA-256: 84b65f02f851dc7c4fcacfd414ec8dda9ba7ede802352453d42d207fa6303c7e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with at least one (`https://trafficel.ru/aws?utm_term=roman+numeral+clock+template+printable`) appearing to be part of a link farm designed to redirect users. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` further suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7015

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://trafficel.ru/aws?utm_term=roman+numeral+clock+template+printable
    • https://nikatomorufaxeg.weebly.com/uploads/1/3/1/4/131437252/1691977.pdf
    • https://site-1193467.mozfiles.com/files/1193467/c_compiler_ideone.pdf
    • https://site-1174473.mozfiles.com/files/1174473/nepozagusa.pdf
    • https://site-1174531.mozfiles.com/files/1174531/wepexeridibegaj.pdf
    • https://site-1176519.mozfiles.com/files/1176519/devil_ninja_fight_1__2_apk.pdf
    • https://cdn.sqhk.co/boxadiweteve/yZggjjl/50665918514.pdf
    • https://site-1229354.mozfiles.com/files/1229354/zuradi.pdf
    • https://cdn.sqhk.co/movijomo/jbhfWhi/71924724238.pdf
    • https://cdn-cms.f-static.net/uploads/4479933/normal_5fb59cb0e179f.pdf
    • https://site-1176254.mozfiles.com/files/1176254/96883139679.pdf
    • https://s3.amazonaws.com/rujabepifar/vodotosejexomob.pdf
    • https://s3.amazonaws.com/lorifumofelu/tesow.pdf

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