Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c2aea247f05f00…

MALICIOUS

PDF

68.8 KB Created: 2021-02-14 18:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 651aa38ec935fbbb0ced9e1afba870f8 SHA-1: db86a6e05dfd309ae6a79bd03f1656747fb7b434 SHA-256: 95c2aea247f05f0046f31dab608a0318f3bd6e2de8e3bc51dbcefd89c9a6d124
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting it functions as a lure for phishing or malware distribution. The presence of external URIs and the link farm heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=uninstall+wow+without+battlenet PDF link annotation
    • https://cdn.sqhk.co/napumefu/9iahiha/gmc_stepside_bed.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/kk4EMhg/95536297886.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459792/normal_5ff987d1e006b.pdfIn PDF document text
    • http://rabifew.iblogger.org/finsbury_growth_and_income_trust_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/jhbdwia/60442515023.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/8hcnjdF/draughts_definition_oxford.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_5fd0dab7bbb33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_600e2f9518fa0.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/0G6hfjf/92285217897.pdfIn PDF document text
    • http://lamorebeduzakoj.22web.org/rowebejafot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419623/normal_60057795398cb.pdfIn PDF document text
    • http://bamitizelomodil.22web.org/25125289969.pdfIn PDF document text
    • https://cdn.sqhk.co/velovezem/Un8nPqU/multiplayer_driving_simulator_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://palojolasorut.rf.gd/american_anthem_movie_free.pdfIn PDF document text
    • http://dimaninerif.rf.gd/rosipodimidedenogaropek.pdfIn PDF document text
    • http://sovizurimi.rf.gd/49495361494.pdfIn PDF document text
    • http://ledukuxadom.epizy.com/riluposifixa.pdfIn PDF document text
    • http://lemijafuw.epizy.com/apkmonk_safe_to.pdfIn PDF document text
    • http://xumomevafuvozup.rf.gd/cphims_review_guide.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_off0000d073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD073 4900 bytes
SHA-256: fdb47e5e7bb170f0491b8fb03454b5c4dff5016de5c16e9f6ea30d2a17b9bf31
font_01_sfnt_off0000e131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE131 11164 bytes
SHA-256: bcdf0bfea1eae830fa42743bd38736de36dfb58e4dd16d3930fa604e1f022e46

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