Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d8ddea293203b4…

MALICIOUS

PDF

86.4 KB Created: 2021-03-24 18:19:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf8b0a62d4640d5562620025abc09f9c SHA-1: e60f7d61f1fb7c2db0305fc4e863a08b5a45c306 SHA-256: 37d8ddea293203b49c59d634b056726e19d3fb526620aeea2ebfba0a5d9ba7f7
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The presence of external URIs and the 'link farm' heuristic suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://soxebez.ru/award?keyword=allegra+xarope+bula+pdf PDF link annotation
    • http://abzac.me/infinix_note_4_price_in_nigeria0ir6f.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/the_analysis_and_design_of_linear_circuits_solution_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407788/normal_5fccc93bb6111.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/AFgeNja/russian_cars_priorik_2.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/wulerelufivunolesopoj.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/juzufekajenu.pdfIn PDF document text
    • http://hookup757.fun/masonry_wall_design_spreadsheet8v6ta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384655/normal_5fecd4933a5dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_60300b0132810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369524/normal_5fef472204a64.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/clause_49_of_listing_agreement_2020.pdfIn PDF document text
    • http://mifirejetevina.getenjoyment.net/1575745640.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/el_arbitraje_internacionalq7542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447095/normal_60504f937e6f3.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/OhdIiig/aurora_missile_design.pdfIn PDF document text
    • http://getbuiss.online/zoxasikokugen9c2bj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1f11fb13-a1ec-4d7f-bda6-3d503342719c/50484603687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86303065-c02d-4acf-a319-b0816d432a3e/67755279767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07675cf-9ff3-41e4-b929-b97d8a9bcfa7/como_hacer_un_archivo_de_imagenes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2da81e6-ea92-42b8-b05f-4766a90af8ee/war_of_the_worlds_original_movie_poster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c817018-2369-4e08-9dc1-8c578ae73990/2015_jeep_cherokee_service_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10211 4876 bytes
SHA-256: 26aca41a1a90fabeb66ec417d2370e6dad417cea12ef19620437378c65dc7db0
font_01_sfnt_off000112b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B7 14488 bytes
SHA-256: f1d7f6c949ca6d7d5062b27938eb48affef621132cec04ffb5d27745cb468ff8
font_02_sfnt_off00013ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3