Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e436d39f88568b4…

MALICIOUS

PDF

87.9 KB Created: 2021-03-23 08:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 36ae84723f44ab5f00ed9a08923c9003 SHA-1: e5bbf54bbfedce319b9f3c222722fa4682c4a7c5 SHA-256: 6e436d39f88568b448f3f044d03f1437b8af83f6c806979e114f6e9e5aa80d33
206 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ClamAV signature and an ML classifier. It functions as a link farm, containing numerous external links to other PDFs hosted on various domains, including 'bologen.ru'. The heuristic 'SE_CALLBACK_LURE' suggests a potential phishing or tech-support scam pretext, although the document body itself is heavily obfuscated and does not provide clear textual content. The presence of many external links indicates an attempt to redirect users to potentially harmful content or download further stages of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=ninja+kitty+pubg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493610/normal_60404f4b01fc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5ff678542b0af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_602645f722ca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_60349a9125801.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5ff9f396cf5c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456399/normal_5ffac482b1e5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_601ad4178bcb8.pdfIn PDF document text
    • https://vakalebixop.weebly.com/uploads/1/3/5/3/135339933/rusimosumugumiwiveju.pdfIn PDF document text
    • https://cdn.sqhk.co/sulubejes/hdijNic/ship_games_simulator_professional_v2._0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410433/normal_5ff79cb042fe2.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/euiaiod/real_driving_simulator_mod_apk_download_for_android.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/jeguxiw-denuvotuw.pdfIn PDF document text
    • http://autobuff.xyz/950962021xlhdb.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/401850380a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379959/normal_604d4e6bb6e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447107/normal_6051b02004dc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413703/normal_5ff5412936986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_6047d0877b6b0.pdfIn PDF document text
    • http://8bitbeardsco.com/best_blues_guitarists_of_all_time_listw2rmd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_604786b517ea9.pdfIn PDF document text
    • https://wodirukuz.weebly.com/uploads/1/3/5/3/135398055/8a2ebd07fbd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_604cda9329be9.pdfIn PDF document text
    • http://daating19.site/16006930097vuwxx.pdfIn PDF document text
    • https://bagekitavaseb.weebly.com/uploads/1/3/1/0/131070055/1569401.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/iaiaXjj/dynamixel_workbench_position.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5fced34c2db38.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000fbec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFBEC 8272 bytes
SHA-256: c9ba67061487d233d5cad69bc8357d1b83d7b7974d864a7f7d540ad8357adade
font_00_sfnt_off0000eaa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 5032 bytes
SHA-256: 771b413a2d5568768baca53a715416f58ac40ce16dca574891d93f6e96978f4c
font_02_sfnt_off00011809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11809 10660 bytes
SHA-256: d3eaf8a53bdcb97b5182ff580328e68a787ced0780f1c5d8bcd38dc81864844d
font_03_sfnt_off00013c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6D 16148 bytes
SHA-256: 676a6f9980301d650ad9b511319da6dac9fff4f77c228169d287e5253a078183