Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e5decf206028a1…

MALICIOUS

PDF

72.7 KB Created: 2021-06-12 21:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 013696326ecc044711110ce08e5ab654 SHA-1: 0a19a47c93d8182079d8f557dd95e66511233f7e SHA-256: f3e5decf206028a181cb19f43001d770ecb39ace22d0f17b0d49b47a57524e11
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous external PDF links, likely to distribute phishing content or further malware. The presence of a 'utm_term' parameter in one of the URLs suggests a tracking mechanism for a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://huntic.ru/pbw?utm_term=fifa+19+apk+obb+file+download+for+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411944/normal_6009a5988afbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481515/normal_5fd6dc1d102ed.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/8513224.pdfIn PDF document text
    • https://zupalopozaguri.weebly.com/uploads/1/3/2/3/132302876/1bf0f315.pdfIn PDF document text
    • https://fuvogazukipow.weebly.com/uploads/1/3/4/6/134603691/1a36d1.pdfIn PDF document text
    • https://lenoloxib.weebly.com/uploads/1/3/4/0/134040664/b98397b4ed9dc2.pdfIn PDF document text
    • https://viwezoluzuwa.weebly.com/uploads/1/3/4/4/134401695/salukum-gilolexojidikos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_60387ed279ff4.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/f943c28e.pdfIn PDF document text
    • https://mekiwukokoviv.weebly.com/uploads/1/3/4/8/134867966/d5ea36.pdfIn PDF document text
    • https://fivomatimib.weebly.com/uploads/1/3/1/0/131070631/diropejuna.pdfIn PDF document text
    • https://xutezanepone.weebly.com/uploads/1/3/3/9/133999331/8877026.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473640/normal_5fe08aac8e1c6.pdfIn PDF document text
    • https://dujisiseruw.weebly.com/uploads/1/3/0/7/130776106/ranifusoreka-vabujupimivapo-botalawir.pdfIn PDF document text
    • https://panodetis.weebly.com/uploads/1/3/4/6/134669877/62d6d8b77094.pdfIn PDF document text
    • https://kumojazoj.weebly.com/uploads/1/3/1/3/131381946/3326519.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5ff516d9def3e.pdfIn PDF document text
    • https://xamonato.weebly.com/uploads/1/3/2/8/132814301/gogivekita.pdfIn PDF document text
    • https://nefipuximejax.weebly.com/uploads/1/3/2/6/132696351/zelumatade_kibowije.pdfIn PDF document text
    • https://tavasosezirom.weebly.com/uploads/1/3/4/7/134768566/9844462.pdfIn PDF document text
    • https://rizaxulizogi.weebly.com/uploads/1/3/4/7/134753796/jolaje-gunilobonom-pupibu.pdfIn PDF document text
    • https://wivetagimogik.weebly.com/uploads/1/3/4/6/134618772/7878002.pdfIn PDF document text
    • https://domoposuselof.weebly.com/uploads/1/3/4/7/134720049/ed7b59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_6001d7c22da86.pdfIn PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/d9cca38d.pdfIn PDF document text
    • https://xoxatazafej.weebly.com/uploads/1/3/4/8/134861408/dofof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000de0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0F 5316 bytes
SHA-256: 835ab16a9e25e4b4c128c48af94c741e14574e457f5a9c32a6236637a0132fce
font_01_sfnt_off0000f049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF049 10736 bytes
SHA-256: 437f023daa470313ea77b16f52f6773365c91e25c051b60f81a81b2095498bb5