Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9af632f2669cca…

MALICIOUS

PDF

73.1 KB Created: 2021-04-20 20:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dbef022bd225278b369b5739d444de8 SHA-1: 3d2cc58e42664047ccc1c5e7567cc2168a270965 SHA-256: da9af632f2669cca9612dc7811dde8b69a549704780cd0f0328274994a42aa88
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'resalured.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'basic law books for beginners'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a malicious intent to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=basic+law+books+for+beginners
    • http://lolabarafusiru.iblogger.org/zilipasonolisid.pdf
    • http://xafesuvorolivig.scienceontheweb.net/72555809534.pdf
    • https://cdn.sqhk.co/gesimefav/pifhiih/60693231855.pdf
    • https://cdn.sqhk.co/telupiza/dijhhjV/51238224493.pdf
    • http://duxojiz.iblogger.org/270536610.pdf
    • https://cdn.sqhk.co/mixaluwekitu/AhbNiee/88999166672.pdf
    • https://cdn.sqhk.co/fukafodifi/q0ifOgd/34359127172.pdf
    • https://cdn.sqhk.co/suxejatove/iihjjA7/siroko_snowboard_goggles_review.pdf
    • https://cdn.sqhk.co/gozolijitow/EidihN5/moredomavukisaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nawopadawejiw.epizy.com/74463464596.pdf
    • http://noxukimu.myartsonline.com/ccna_book.pdf
    • http://majilore.rf.gd/bartonella_bacilliformis.pdf
    • http://tivemuga.rf.gd/fuperukiwetorez.pdf
    • https://s3.amazonaws.com/xarojapi/kowugopeboroxobivinezofo.pdf
    • http://begulazelukej.rf.gd/que_son_anticoagulantes.pdf
    • http://letugupinuvanu.rf.gd/93354334716.pdf
    • http://vefelazubogimew.rf.gd/trust_deed_property_template.pdf
    • https://s3.amazonaws.com/luropi/25205983358.pdf
    • http://xijejuvi.myartsonline.com/10885933325.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e01c.bin
57bf1507b829ce1f81d7a53fa881471e26911cd78c4095fa29b4f8a446e903d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 5396 bytes
font_01_sfnt_off0000f2a0.bin
61cefb65d79a5b0487b428de50b9e46819e162c561d1d84b9ae778cd765a988d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 10788 bytes

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