Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b07463c6f6df210…

MALICIOUS

PDF

92.5 KB Created: 2021-03-18 16:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: c7803b65ab44a22f869884b8788d613e SHA-1: 7676e552e585794f2d305be409f893f312839ff3 SHA-256: 4b07463c6f6df210921a7ad1d4abad404e1993477cb65eb2fe5c419ea57e7bec
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, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'golowaki.ru', suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a link farm on disposable hosting, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=news+article+example+english PDF link annotation
    • http://whitetwo.space/super_mario_bros_3_gameboy_advance_rom_downloaddhwvm.pdfIn PDF document text
    • http://ejinaya.com/bokadederpa0v9.pdfIn PDF document text
    • https://nevikafujar.weebly.com/uploads/1/3/4/3/134380077/titevilemaxadituso.pdfIn PDF document text
    • http://lanejaselisipu.22web.org/59251750682.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5ff8c091b388e.pdfIn PDF document text
    • https://duvedibis.weebly.com/uploads/1/3/4/1/134131600/33cf8f8.pdfIn PDF document text
    • https://somakala.weebly.com/uploads/1/3/1/4/131409557/popilitolomafav_mafevutiron.pdfIn PDF document text
    • http://hdsamara.ru/79948460299xhlgy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411512/normal_6024f50c4e419.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_600793767037b.pdfIn PDF document text
    • http://milanomoda-italy.site/amway_atmosphere_skyl1xli.pdfIn PDF document text
    • http://dvestideyli.xyz/application_architecture_design_document_templatele3bo.pdfIn PDF document text
    • https://nunezexivu.weebly.com/uploads/1/3/4/4/134440215/9c02c621e73aa62.pdfIn PDF document text
    • http://vinuporabomod.iblogger.org/java_programming_challenges_for_beginners.pdfIn PDF document text
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/fekavanaxid_petusumojigugi_divewige.pdfIn PDF document text
    • http://womenita.fun/quadra_fire_4300_wood_stove_bloweropmap.pdfIn PDF document text
    • http://naykaryadom.fun/49710047526dygyv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pewulalabes.epizy.com/learn_break_dance_video.pdfIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_e5d9dabe4d6c45a1a02110cf143f1efd.pdf?index=trueIn PDF document text
    • http://tugitogulagerek.epizy.com/maytag_bravos_xl_error_code_f5_e3.pdfIn PDF document text
    • http://fepadegan.epizy.com/physics_classroom_momentum_and_impulse_worksheet_answers.pdfIn PDF document text
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_6ac071a6a2cf4de3a0a9db5c52eb9f83.pdf?index=trueIn 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_off00011f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0E 5156 bytes
SHA-256: 47cc8fb3bcffee28ec88840a354c7d965abaa9fd9aafceddea7cf1f16e69d68e
font_01_sfnt_off00013076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13076 11088 bytes
SHA-256: 59d3c2423a4ba0d73c3169e16a2c0e30b05549dd138338ff31b0aa8417297ec3
font_02_sfnt_off0001560e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1560E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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