Malicious PDF — malware analysis report

Static analysis result for SHA-256 62df013c470b3616…

MALICIOUS

PDF

83.0 KB Created: 2021-05-25 07:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8f22b3e66af8179801e0d104d403f49 SHA-1: d51a659742e50e896de06863b38f9ca1f468c8bd SHA-256: 62df013c470b361694abf602e1dac99fd1b8186e5c240b5c58ed02efb9160043
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML heuristics identify this PDF as malicious, specifically a phishing or trojan variant. The presence of numerous external links suggests it is designed to redirect users to potentially harmful content or facilitate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=singer+sewing+machine+repair+near+me PDF link annotation
    • https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/8610848.pdfIn PDF document text
    • https://nefotinabe.weebly.com/uploads/1/3/5/3/135314884/lubujeg_sosizatob_vonabe_lesokolobonek.pdfIn PDF document text
    • https://bopizuvobaz.weebly.com/uploads/1/3/4/6/134668398/taladeb-bizojod-voxus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fcd3404bc97b.pdfIn PDF document text
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/6978000.pdfIn PDF document text
    • https://lonupuvajofova.weebly.com/uploads/1/3/4/3/134341927/rakedamirojuru-tanetuwigo-woguvonisag-sitarovixut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_6026cf5dee275.pdfIn PDF document text
    • https://vizokajobekaxa.weebly.com/uploads/1/3/0/9/130969885/lesebed.pdfIn PDF document text
    • https://lotojenamiz.weebly.com/uploads/1/3/1/3/131381761/e6bf79.pdfIn PDF document text
    • https://pedexanagokol.weebly.com/uploads/1/3/4/6/134635549/78f792e.pdfIn PDF document text
    • https://waragiteket.weebly.com/uploads/1/3/4/0/134016771/fbaec65b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426085/normal_5ffb7fe8d5e8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469349/normal_606a125852a82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_603b9e43a0dfe.pdfIn PDF document text
    • https://mexobuvuxe.weebly.com/uploads/1/3/4/3/134369937/batuxo-kaxep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_5fd161bc9c0d0.pdfIn PDF document text
    • https://meputaxuxiku.weebly.com/uploads/1/3/5/3/135304120/3140585.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403271/normal_6008801e86ce3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/899f1f45-6227-42ad-af40-48961ea00ca1/15784881993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3198e39f-50c3-4ffe-9de6-7e0f3a67434d/compare_the_top-down_vs_bottom-up_network_design_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d8cad6-cc6e-4aef-b330-ebe0b2efed27/how_do_i_use_my_bissell_proheat_2x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c089351f-b681-43ce-b661-fe0f94308327/why_is_my_xbox_controller_charger_blinking.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_off00010758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10758 5508 bytes
SHA-256: 76feefc0f6051e2f40802efe2d2e5c59978e77871564e55994181073534e58dd
font_01_sfnt_off000119fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 10772 bytes
SHA-256: 1cf44181341c4e845c0420d7ebd1ad17b83534040f530f7c5218aff0dd9370e5