Malicious PDF — malware analysis report

Static analysis result for SHA-256 01052ec69c4f4d02…

MALICIOUS

PDF

69.6 KB Created: 2021-02-27 00:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c37fafb1c274bbcf38c0fbf232776f68 SHA-1: dcba3ba72169d3c9dafa3ae3f50dab13295ef5bd SHA-256: 01052ec69c4f4d0272a66f1a8c498efe26050593ecc1a4c005e9fe4db23f1703
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to purchasing a furnace, directing users to a suspicious URL. No scripts were extracted, but the PDF structure and embedded URIs indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7739

Heuristics 4

  • 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 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://nipisod.ru/aws?utm_term=where+can+i+buy+a+furnace+for+a+mobile+home PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424645/normal_60305f46a622a.pdfIn PDF document text
    • https://sugowula.weebly.com/uploads/1/3/4/6/134646485/kesogelutugofagafiwa.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1161214.pdfIn PDF document text
    • https://bekodezu.weebly.com/uploads/1/3/1/8/131856725/lagakaxo.pdfIn PDF document text
    • https://zunudomulu.weebly.com/uploads/1/3/4/6/134604261/9096564.pdfIn PDF document text
    • http://luxshop21.site/haddonfield_umc_bulletinxvyf3.pdfIn PDF document text
    • https://zugavugusalozi.weebly.com/uploads/1/3/0/7/130776271/c557d9f.pdfIn PDF document text
    • https://figokafudifugi.weebly.com/uploads/1/3/1/3/131383964/7902830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_603220371e1b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410000/normal_603337484f3a6.pdfIn PDF document text
    • https://mejotowud.weebly.com/uploads/1/3/0/9/130969644/vaxures.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401732/normal_5ff25fea7afa3.pdfIn PDF document text
    • http://c-advance.space/45286276002tehx0.pdfIn PDF document text
    • https://guvoruba.weebly.com/uploads/1/3/4/7/134742814/pobatid.pdfIn PDF document text
    • http://piredvizhnik.com/tibazpdpeq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toguvaju/lonegum.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB99 5000 bytes
SHA-256: 3834de42bf661f6ee59684bdfa5fa2e4a935fd154d52c1075f827c05c9573f0b
font_01_sfnt_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 10548 bytes
SHA-256: e5c29ccf4b4de9f472a3dafa2499ecfad92b2b94211d8cca7a1f1a14413dcdd8