Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf07e1a4f1f895e…

MALICIOUS

PDF

66.2 KB Created: 2020-12-01 15:18:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1e1890b20277144c30f28d7c78ed48f9 SHA-1: 7fd4e15e37e72d85a9f36449cba62d406057c772 SHA-256: 0cf07e1a4f1f895e200a85c362faa4d279942ab26b01db5a10f63febb99669bc
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate the document is designed as a link farm on disposable hosting, likely to phish for user credentials or lead them to further malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=insignia+ns-ant715+manual In PDF document text
    • https://ponutafozo.weebly.com/uploads/1/3/4/7/134705240/kubibev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_5fa4d16538d9e.pdfIn PDF document text
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/4145325.pdfIn PDF document text
    • https://vozuzuxe.weebly.com/uploads/1/3/4/3/134314749/sapemok_dijuwimaroj_bobanevunaziwag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_5fbc5d709d496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_5fa72b9a3fed1.pdfIn PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/6338b9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382976/normal_5fc59a82abe0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_5fa0ba7051e1f.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/belogebebivawa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5fa7869e49e51.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/silubebebefuju/.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe10d65147b14804fa89ef/1606291670168/try_it_youll_like_it_life_cereal.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/5009369713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89cfa57a-4a5d-48b2-abf7-919c1c969276/31862349545.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB30E 2884 bytes
SHA-256: 50282ae6b398c6550007f6bbc7507911752da4392849308ca45805a20a6efc86
font_01_sfnt_off0000bd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4C 5132 bytes
SHA-256: 4d10c001bcb11af7640ee7ec7be6a2c7811e69ee12a149625faef5d2b5fa410c
font_02_sfnt_off0000cece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECE 13144 bytes
SHA-256: 56db4c43e89507bf1a22d2b3a27c8238de9d16188420c06dcae6977903f7ec33

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