Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fbe42adaeb31ed…

MALICIOUS

PDF

80.5 KB Created: 2021-02-27 01:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b6d1d00ef530d64799865480e1a54ec5 SHA-1: e63910e08d8b543d317ad673b7249c172098b76a SHA-256: 49fbe42adaeb31edb73d768d760b80cc9e9127dcd6bc0fdc678da12ba8919254
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. The primary URL, 'https://dugedepap.ru/strik?utm_term=iso+31000+risk+management+plan+template', is associated with a phishing lure. ClamAV detection as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further confirms its malicious nature. No scripts were extracted, but the overall structure and URL suggest a phishing attempt.

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://dugedepap.ru/strik?utm_term=iso+31000+risk+management+plan+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383304/normal_600657f3ee2ae.pdfIn PDF document text
    • http://dontbeshy.xyz/highway_traffic_game_poki2395p.pdfIn PDF document text
    • https://duloduwo.weebly.com/uploads/1/3/4/8/134850843/pamokapetur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476268/normal_6007e3ca561a1.pdfIn PDF document text
    • http://deluwotitawugo.iblogger.org/dozigesuxodexibevokakaj.pdfIn PDF document text
    • http://reduslim-officialsite.site/mamenilupenuia7k9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417988/normal_60338122193c0.pdfIn PDF document text
    • https://lulegosepo.weebly.com/uploads/1/3/0/9/130969478/858d45c13a.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/gepalemapifofuzogid.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/64383991587.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/how_to_start_an_observation_paper.pdfIn PDF document text
    • http://chistohome.moscow/how_much_does_ccna_certification_costps08b.pdfIn PDF document text
    • http://fenellalucynelle.info/vamigemonaxuvlrsaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nowonovege/automotive_lighting_system_circuit.pdfIn PDF document text
    • http://dimonejoxu.rf.gd/vba_worksheetfunction_match.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/project_management_skills_interview_questions_and_answers.pdfIn PDF document text
    • http://vidabovon.epizy.com/seposupewikaxefududu.pdfIn PDF document text
    • http://kikisitakas.rf.gd/ridedurefafipezewajuziru.pdfIn PDF document text
    • http://xinirujoki.epizy.com/seesaw_suga_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/microsoft_access_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/gunexeputovotokik.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_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 5496 bytes
SHA-256: a2531a552022aa17c0ef433d0abba5686eee50611bdc5fcdc8486973798ac49d
font_01_sfnt_off0001106b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106B 10480 bytes
SHA-256: fb771e12211e282313007884e4b89b551f98bc47d1966710d8db059b72cb3383

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