Malicious PDF — malware analysis report

Static analysis result for SHA-256 b726c45e077d247f…

MALICIOUS

PDF

90.1 KB Created: 2021-03-16 20:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a17a5e0653ce50820f2ba9bc5d22ce8 SHA-1: dd175cde551c7771f1826460cbf36aabbb30e8d0 SHA-256: b726c45e077d247ffb7a00806ab1051248c18bd9545aee0a4cc1a7f72ac5ab49
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a review context, further supporting the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=kizer+begleiter+review
    • https://static.s123-cdn-static.com/uploads/4418401/normal_6006a8dd4df8f.pdf
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/zelamekuvulitad_dinijupa_repumu.pdf
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5fe7102d1035d.pdf
    • https://cdn.sqhk.co/derepinejabi/Nsighgh/sofarilugot.pdf
    • https://cdn-cms.f-static.net/uploads/4425504/normal_5fea05adb1c99.pdf
    • http://fsfsfd.xyz/76258467660nz84g.pdf
    • https://mekumago.weebly.com/uploads/1/3/5/9/135981587/6195429.pdf
    • https://static.s123-cdn-static.com/uploads/4478383/normal_60087eb9b7944.pdf
    • https://mubuvume.weebly.com/uploads/1/3/4/8/134885019/7957011.pdf
    • https://bivilasafufi.weebly.com/uploads/1/3/4/6/134689398/rafezukaf_birujofufuxofar_rekojixe.pdf
    • http://triple-doska3.club/159123629763xo1v.pdf
    • https://cdn.sqhk.co/vilubofi/fd4gfji/84125972705.pdf
    • https://cdn.sqhk.co/virurewev/iCjfOGC/pitebiwosaxomojexusanow.pdf
    • http://stav-games.ru/komadazodemejibrv6kh.pdf
    • https://cdn.sqhk.co/jasojime/5nI37Wn/stickers_in_spanish.pdf
    • https://cdn.sqhk.co/rufebumu/jicjbje/dota_underlords_tier_list_march_2020.pdf
    • http://zoneeuro.pro/articles_definis_indefinis_partitifs_exercices8b3bs.pdf
    • https://tutamakut.weebly.com/uploads/1/3/0/7/130776204/6322648.pdf
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5fdbec8553be1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a7822763-7748-4be0-8661-7e3b55bcb825/practice_worksheet_quadratic_inequalities_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/87f5f340-3d1d-4936-b8f0-85bca1069eea/performance_tool_obd2_scanner_manual.pdf
    • https://uploads.strikinglycdn.com/files/ada93ce6-aa69-43d6-a617-0e25540df1cf/m2n68-la_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/ac7a3b06-76c3-4fe6-ac80-afab55fc7a79/the_rules_of_the_game.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012305.bin
e3f73bbb522652e7ca852c43fccf8c79592479d407852aa9d3c7894a99931a72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12305 4776 bytes
font_01_sfnt_off0001337a.bin
8b1e001fa7a878b4f3c0d069336bf5ad01a1c2287ef4560f25cc20144a5747b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1337A 11780 bytes

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