Malicious PDF — malware analysis report

Static analysis result for SHA-256 031f7c7b9f457901…

MALICIOUS

PDF

56.7 KB Created: 2021-02-17 02:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c0b5e3db7f9801a5c465c505897f2908 SHA-1: 9766c2e564ea02a5ee07298723584ccae8189a0f SHA-256: 031f7c7b9f45790104e7890244c4ef0fc79171571e5f49f37deb2caeedf3defa
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with at least one pointing to a suspicious domain ('jottigo.ru') that is likely part of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a malicious intent to obscure the true destination. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's prediction strongly suggest malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6699

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://jottigo.ru/strik?utm_term=dirt+devil+power+express+lite+stick+vacuum+red PDF link annotation
    • http://bilapak.66ghz.com/xodepojamimape.pdfIn PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/jotekupegepedobaxu.pdfIn PDF document text
    • https://nolemidu.weebly.com/uploads/1/3/4/5/134584078/5466336.pdfIn PDF document text
    • http://befemoxujutebi.22web.org/template_builder_free.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/dinigiwu-lubogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5feb04645e481.pdfIn PDF document text
    • http://wozufilugud.iblogger.org/fistula_perianal_tratamiento_quirurgico.pdfIn PDF document text
    • https://zikazofikadit.weebly.com/uploads/1/3/0/7/130739129/cedf3bc03.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/document_analysis_the_mayflower_compact_answer_key.pdfIn PDF document text
    • http://mavuginogafesu.epizy.com/tutupaxuroxetidufixi.pdfIn PDF document text
    • http://girigiroret.rf.gd/rivulelanabilaja.pdfIn PDF document text
    • http://puzuwekamem.epizy.com/28278538629.pdfIn PDF document text
    • http://tukozadagafewan.rf.gd/naten.pdfIn PDF document text
    • http://jafojib.rf.gd/charity_event_poster_template.pdfIn PDF document text

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