Malicious PDF — malware analysis report

Static analysis result for SHA-256 012eae272a489a11…

MALICIOUS

PDF

70.6 KB Created: 2021-02-20 22:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ad08fb75a16fcc8bec49a2b8c3a0e9e2 SHA-1: d755c9c72f0f52d59b832c6f7519438ac0e96dfe SHA-256: 012eae272a489a111766996037293766582d73cfdcaf1e526cfb627f23863472
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to external domains, with several heuristics indicating a link farm and potential phishing activity. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a phishing or malware distribution lure, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=the+monkey%2527s+paw+movie+poster PDF link annotation
    • https://cdn.sqhk.co/kisereta/eitgiii/jurassic_park_survival_game.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/Ljiwb1q/58864789653.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/jyiaBOC/clouds_cast_members.pdfIn PDF document text
    • https://cdn.sqhk.co/kubasovusi/d4jeib0/super_mechs_hack_tool_2020.pdfIn PDF document text
    • http://cupe1.ru/revamus94u8t.pdfIn PDF document text
    • http://usejus.club/free_esl_worksheets_for_elementary_studentsv7y6o.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/icibOt3/11891795202.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/00GarjH/73179067356.pdfIn PDF document text
    • http://usecabinets.xyz/pegizotadisu5asv5.pdfIn PDF document text
    • http://itdomen.fun/be_with_you_2018_subtitle_englisho68xu.pdfIn PDF document text
    • http://bizbize-yeteriz.org/killing_sacred_cows_curry_blakebaw43.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/fAVhioQ/pojegeveko.pdfIn PDF document text
    • http://welifenepural.iblogger.org/where_are_the_military_bases_in_dayz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rufuregebedus.rf.gd/fun_math_activities_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/levufajipixidoji.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_off0000d804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD804 5328 bytes
SHA-256: a1e882a9ab02b1f0f55a575413ce7adc829b38cb80968ec644c454802acf8051
font_01_sfnt_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 10416 bytes
SHA-256: 0104c2b23fafa2d34c4835b8a3db370597642426ba8a5b9615da13dc95c90fad

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