Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6590aacf34fb29…

MALICIOUS

PDF

92.4 KB Created: 2021-02-18 00:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3c1c7d9e7853c217e8d9580f09abf74c SHA-1: d9572ec5888df61db1e34fd9e524ba8c08b38dff SHA-256: 0c6590aacf34fb298f630e7f27a5ab97d9c386b924fe45efec850af2a5cd4b59
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jacksth.ru/strik?utm_term=pod+xt+live+edit+software PDF link annotation
    • http://xojitufos.66ghz.com/outlaw_king_review_parents_guide.pdfIn PDF document text
    • http://hookup750.website/29820781376ycyei.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/gGRChbc/wipipejizunoxadaxo.pdfIn PDF document text
    • http://vashmaster.info/simple_slideshow_after_effects_template_freewqmy0.pdfIn PDF document text
    • http://trenketo.buzz/giwalozilofogogazut8wkk6.pdfIn PDF document text
    • http://cadenalia.com/teburoraw5tuo.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
    • http://pubilovojut.epizy.com/44997924178.pdfIn PDF document text
    • http://surusulo.rf.gd/netflix_error_22005.pdfIn PDF document text
    • http://bapifodog.epizy.com/company_profile_design_template_sample.pdfIn PDF document text
    • http://bigefen.rf.gd/61904536804.pdfIn PDF document text
    • http://gibapomidumitar.rf.gd/ost_anime_carole_and_tuesday.pdfIn PDF document text
    • http://vezigaje.epizy.com/color_game_board_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/cardiopulmonary_assessment_physiotherapy.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12148 4804 bytes
SHA-256: 6b40b81c17ea9a68a1baec8cb9d7749c1dd819c923a10e4d41d132d057b117fa
font_01_sfnt_off000131c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C4 10740 bytes
SHA-256: 780e0137bc47c4da323f32fc5a3979cd15f54e2de10ec0173c5fb63145a67552
font_02_sfnt_off00015691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15691 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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