Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7835fc3e28b9a5…

MALICIOUS

PDF

75.9 KB Created: 2021-05-02 11:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9702bb8e359de3d4b35cb702106e5e98 SHA-1: efb3ac1ed46ec1d979019094ee05dbd59feccbe5 SHA-256: 5b7835fc3e28b9a5086599fd2d3527e539631de0e3dd23c4d01f40b5d9e0bd94
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent link pointing to 'gimoguvi.ru' and a query parameter suggesting a lure related to stock market trading. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for multiple links, reinforcing the phishing or scam nature of the document. While no scripts were explicitly extracted, the ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics strongly indicate malicious intent, likely involving redirection to malicious 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
  • 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://gimoguvi.ru/strik?utm_term=what+is+call+writing+in+stock+market PDF link annotation
    • https://cdn.sqhk.co/vimerokil/hiaibii/alan_mikhail_god_s_shadow_review.pdfIn PDF document text
    • https://sawisede.weebly.com/uploads/1/3/2/6/132681865/bavuzosil.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/7if5fjh/free_video_call_online_live.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/terexan-lofejip.pdfIn PDF document text
    • https://cdn.sqhk.co/rekosiseweno/wxjcgc7/cube_dice_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/LXiigAO/17678649991.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/jbhiknW/zojij.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/futuxapike_kefoxis.pdfIn PDF document text
    • https://wefikugozakilo.weebly.com/uploads/1/3/1/0/131069992/liguvigezikew-wosixuwutawotep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422168/normal_5fe09e0b8dc48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_604b69b6d6f90.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/ZrgcEuC/bowling_3d_extreme_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/rekosiseweno/r5fjgha/futurama_worlds_of_tomorrow_mod_apk_2019.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/xesigeze/43003845491.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/posejutidagi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/5873780996.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/76188991480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfbc9032-a55c-430f-aa57-8331e23ca768/subaru_ex27_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41bcec6-1194-41f0-8ede-64766554a213/62908257425.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_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 5384 bytes
SHA-256: f2853fdf7be1c0facad497ec0014612f5184f06e8c9e20312c92cb0f700d0135
font_01_sfnt_off0000fe1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1F 10648 bytes
SHA-256: c02c15a0db61e73a31b51d5e382eb325ecfccee56cf7b7e1698811318cc58b7e

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