Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7736244026a7fa7…

MALICIOUS

PDF

85.1 KB Created: 2021-03-14 12:02:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fb0b74c4811fddc31a3fa4b0a290b97a SHA-1: 7c93c040b81136fdaedf448e9680e13df984be66 SHA-256: b7736244026a7fa756e869ff7938a586820272774a5f1a4a325e1aa1fea3578a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to exploit vulnerabilities or deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/wix?keyword=matlab+signal+processing+toolbox PDF link annotation
    • https://cdn.sqhk.co/rujiwujik/jbbhbjf/alien_shooter_2d_apk.pdfIn PDF document text
    • http://nashremont.site/the_absolute_basics_of_the_christian_faithus94j.pdfIn PDF document text
    • https://cdn.sqhk.co/tegiriwepaj/lFZjKgg/american_history_trivia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_6036ca5878e6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412396/normal_5fca11bfb461c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473056/normal_604ac7ac2b84e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_602ad4203669a.pdfIn PDF document text
    • https://cdn.sqhk.co/wetabupi/hibRd1k/tojowinebuwedenoki.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/hhih7K6/all_pixel_dungeon_games.pdfIn PDF document text
    • http://com-connexion.xyz/the_blood_of_kings_a_new_interpretation_of_maya_artydswb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_603fa4efd1f1d.pdfIn PDF document text
    • http://mon-cmso.best/rapafubefironupogb12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481291/normal_604b7047c47fa.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/jchfuhb/anime_guy_with_dead_fish_eyes.pdfIn PDF document text
    • http://copriyghtconfirmed.com/2903911406wirju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_6029cadc72833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371240/normal_5ff75c2c8de69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420745/normal_6035c56354b48.pdfIn PDF document text
    • http://wei-nmvc.com/vunezegasawusaboq4g81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_3a63cd82ffb6400c971d1b897e0959b0.pdf?index=trueIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_956b89683ca34d7e8591e63eaa868c75.pdf?index=trueIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_debe69c3a5424ea5818d4e1a52777697.pdf?index=trueIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_3d547f078ba3478fadea4913c4107b0a.pdf?index=trueIn PDF document text
    • http://baxuzotaxuli.epizy.com/budd_chiari_malformation_type_1.pdfIn PDF document text
    • http://rupeguv.epizy.com/be_forward_toyota_hiace_van_manual.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_off00010c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C56 5312 bytes
SHA-256: 5d59536cdd838de04304fd7fdf48c0069c2b510fd79d710fd5b800f116e67d8c
font_01_sfnt_off00011e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E86 11828 bytes
SHA-256: 9a8383d3a5d018fce57501959214514ea6727b089fecf0c1d0c51fd4b2698781