Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f540ec35e09d4ff…

MALICIOUS

PDF

64.0 KB Created: 2021-02-24 23:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3e10db729068b4ae48b1017393301807 SHA-1: 2816883be9ea2a9013e65e9c4d6e074a5ff5fa17 SHA-256: 5f540ec35e09d4ffaf77fdb53b30b5b1757504e6b4bdcd8417366ca817fea43a
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by heuristics as a link farm and potential phishing/malware distribution point. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of external URIs suggests the document is designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6626

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://druttle.ru/award?keyword=free+project+management+software+reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5fc9cd1687183.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/72449199619.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5fcfee9aaf3df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_60255a783eac3.pdfIn PDF document text
    • http://xexogafuko.22web.org/93803124434.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/94538759132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482406/normal_60242b92a4794.pdfIn PDF document text
    • http://dodigemadepa.epizy.com/funirusenuxoxixikejepozo.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/68959002725.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/dubinurakeroj.pdfIn PDF document text
    • http://muzubakow.epizy.com/kewumopavolipufe.pdfIn PDF document text
    • http://xilawon.epizy.com/complaint_handling_at_universities_best_practice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/spinal_cord_arteriovenous_malformation_mri.pdfIn PDF document text
    • http://tanozetodane.rf.gd/tiporedakotupa.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/sekilaz.pdfIn PDF document text
    • http://tekoboworitutew.epizy.com/rogixojebin.pdfIn PDF document text
    • http://borobosen.rf.gd/15130885319.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/94415696237.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/xelozobibidokifegubuzav.pdfIn PDF document text
    • http://vuvuvemalazot.epizy.com/generation_of_computer_programming_languages.pdfIn PDF document text

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