Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a0d892a97816a8…

MALICIOUS

PDF

80.2 KB Created: 2021-02-09 09:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c3a944c48090353ad758e4d9699061c5 SHA-1: 3635201997195ad78a835c1a57a98f6ee56553b5 SHA-256: 98a0d892a97816a813a3ba83ed2d29b1c9343fa082b283ea7d2901a462abad75
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains and link farms, indicative of a phishing or spam campaign. ClamAV and ML classifiers strongly indicate maliciousness. The presence of embedded URLs and the link farm heuristic suggest an attempt to direct users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/123?utm_term=limit+approaching+infinity+e%255Ex PDF link annotation
    • https://cdn.sqhk.co/pimupigedu/dmihnw9/off-_road_driving_desert_offroad_adventure_driving_course.pdfIn PDF document text
    • https://rebavunegiluzu.weebly.com/uploads/1/3/4/4/134497465/bonidufimox_xufogetilem.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/cjdhbDL/yeezy_350_israfil_outfit.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/60cb7ed0.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/h05Djfb/begozajojigitome.pdfIn PDF document text
    • https://lezevonunibo.weebly.com/uploads/1/3/4/5/134577944/973845440866.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/xusifaniguvifibuzuj.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/jicZpM4/911_call_simulator_game.pdfIn PDF document text
    • https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/a66fdea7473fac.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/xufaxoferugod/clumsy_ninja_mod_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/microsoft_access_database_engine_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/vimuxusinapiporuferadom.pdfIn PDF document text
    • http://warufadul.rf.gd/miwufufepegugipisav.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/que_significa_el_uniforme_de_policia.pdfIn PDF document text
    • http://julivaradisakit.rf.gd/selegugi.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_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 5380 bytes
SHA-256: dc318cc41e6a7f15f1497fa0b78fbf13f9f47371a0eb7203288c7e2c26b7eb33
font_01_sfnt_off00010d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D62 11368 bytes
SHA-256: 0fb1376328aecafdf1044d9555f1449b2b764cc5540276aa03e1c00168fda7f7

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