Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fb6bee07b1b2a2…

MALICIOUS

PDF

81.4 KB Created: 2021-03-31 06:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3879a96860216c639c048a0855f92e62 SHA-1: 77419bfa5f517474886b02d7ce21ca21253a31ec SHA-256: e2fb6bee07b1b2a2e00383c01ebfaa62f160837b39e27f96445b6eef29116262
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a phishing page or distribute malware. The document body, though heavily obfuscated, suggests a lure related to a 'screwtape letters study guide'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/wix?keyword=screwtape+letters+study+guide
    • http://8gusevshop.website/160544094346qyu7.pdf
    • http://cocobuka3.xyz/immunization_form_georgia8f45h.pdf
    • http://qrastenmap.online/61786863566pytss.pdf
    • http://aduo5.online/iphone_x_launcher_pro_apk_download_free5mnu1.pdf
    • http://xuxijosut.sportsontheweb.net/literate_programming.pdf
    • http://katipef.medianewsonline.com/41006485920.pdf
    • http://imedo.ru/914739244104jvnb.pdf
    • http://lovelyhouse.online/xobogifivavomugumq9l.pdf
    • http://martakkord.ru/pizevutuzomelizunaxj875u.pdf
    • http://purpless.vip/32198851648zg1pl.pdf
    • http://confirmationhelpcenter.com/planificacin_estratgica_de_los_recursos_humanosh2ouo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_7351d58efa3c402d9b541fbec9e6c82b.pdf?index=true
    • http://xepuzakudera.atwebpages.com/yeast_taxonomy_classification.pdf
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_feec310167444bdea93ad63a02c0b7c8.pdf?index=true
    • https://s3.amazonaws.com/retisovojor/hp_laptop_price_in_nepal_under_60000.pdf
    • https://s3.amazonaws.com/rakabexozu/chamberlain_liftmaster_professional_1_3_hp_manual.pdf
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_7534b73071d04cf3b20a1f11767754db.pdf?index=true
    • https://s3.amazonaws.com/jobavo/8679943471.pdf
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_a5415d9fa4cb4dae8203962c3498da5b.pdf?index=true
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_b614464dfa72497796e9c59192f3dccd.pdf?index=true
    • http://gajopule.myartsonline.com/37997220724.pdf
    • https://s3.amazonaws.com/dowadotiju/vewiwaberakif.pdf
    • https://s3.amazonaws.com/godewumazek/civ_6_gathering_storm_starting_tips.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_off0000ffbc.bin
036d8719de713cb68d3dc38921f676836f6100d4e90f07521bd6d867fa1ed598		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBC 5540 bytes
font_01_sfnt_off000112be.bin
10ff80cab01e35d3314e42dc5180fc178b4d6c15957fb6f3c144f36d3e52ede2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112BE 11168 bytes

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