Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f44c8b0407b1121…

MALICIOUS

PDF

76.8 KB Created: 2021-03-25 17:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 92ad16e6c06740b309db09ffb2028407 SHA-1: 210f7a576faff0bf1d336f2802944811ec4b424c SHA-256: 8f44c8b0407b11219f84414926ae5ebcf5648ab8028b3a0ab92e33588c04deb5
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with one pointing to 'golowaki.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded links indicate it's designed to redirect users to external, potentially harmful websites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=bdo+lahn+pre+awakening+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461495/normal_60062297671be.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/Bjcygdn/raft_survival_sea_escape_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_600c3a7fdf6f5.pdfIn PDF document text
    • https://kitowido.weebly.com/uploads/1/3/5/3/135348724/pozazufiz.pdfIn PDF document text
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/jumufarilisiviwi.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/cxibtDZ/15730552604.pdfIn PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/269fc98.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/d8rYlhj/30618258124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459478/normal_600f3956adf01.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/ajfifBn/teachers_federal_credit_union_membership_requirements.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495975/normal_5fe8bf3090ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_602e6021e082d.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/bj9ifjd/xivex.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/r0tCMhh/cooking_fever_free_gems_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_1b50152040924afeb1cfcb394e27069e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/what_is_the_relative_location_of_africa_from_australias.pdfIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_4a174c61f662452896f0aed4d57f4a8f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xelimewat/38673690467.pdfIn PDF document text
    • https://997b2cc2-d96d-4654-b184-8a5d7ad473c0.filesusr.com/ugd/b8d08c_a2f31c4dea45414dbd8e701275a21de6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kudowo/grammaire_progressive_du_francais_a1_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/98732519504.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB9 5248 bytes
SHA-256: 668f04911c866928493d0951ca447735a1105dfd8a73c8a931822da6cbe4d82e
font_01_sfnt_off0000fda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 11792 bytes
SHA-256: 866cb88c58a26ce4bfcc6fac53ad66bc85d99380dd9aff829cf825ab8dd821cb

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