Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f4db0ebdabe2c9…

MALICIOUS

PDF

72.2 KB Created: 2021-02-25 01:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5b142d9cc566ad798a23b92655c21d67 SHA-1: 4d0ec70965e4dec804dacd35f129afbfaeeb20d7 SHA-256: 01f4db0ebdabe2c991efa48531d8133efe9dbe3855779fd6e8386f00f4087659
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a lure related to a search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and a link farm heuristic suggests the document is designed to redirect users to potentially harmful websites.

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
  • 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://jottigo.ru/strik?utm_term=calories+in+1+sonic+onion+ring PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408864/normal_5fd7de6c8bfac.pdfIn PDF document text
    • http://megatorg.ru/huskee_lt4200_price_newz2itw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_60044c7d884f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_5fe853a67d00b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_602c1aabcb186.pdfIn PDF document text
    • http://academic-club.ru/tugufalaxixzv.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/hc8jcjj/vomisalobelop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5fdc136fa022a.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/gdihgdF/nail_salon_near_me_walmart_plaza.pdfIn PDF document text
    • https://cdn.sqhk.co/rusukumuva/dsqjeji/vuvufoxaba.pdfIn PDF document text
    • https://cdn.sqhk.co/sotisajen/5jds8gh/7307803631.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/bcPHaid/download_pocket_tanks_full_version_250_weapons.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460983/normal_5fcf7de555d59.pdfIn PDF document text
    • http://slampochka.ru/kopalio0apm.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/TghfhpJ/zojozajadutuj.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/al_quran_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482847/normal_5ffadf3f4f60e.pdfIn PDF document text
    • http://autobuff.xyz/sevojuzuvodoxoixffn.pdfIn PDF document text
    • https://cdn.sqhk.co/buxoxurobewi/r7hiJ94/7583854291.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_off0000deac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAC 4924 bytes
SHA-256: 348ad3d57dff95a38e9eeda8f7563b2c0d759f45965543ad332a2457a774a5b1
font_01_sfnt_off0000ef7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7D 10540 bytes
SHA-256: fdaacac5a8a4a9a7380eafdbf0c1f64341dbd23ef6be92118338c68ace9dfbc1

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