Malicious PDF — malware analysis report

Static analysis result for SHA-256 549d3d0e4f187bcd…

MALICIOUS

PDF

87.6 KB Created: 2021-04-05 08:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7629fd049ab15e9f60c58f299b49ae39 SHA-1: b7a261f9128ce4290160e57f0e58453fed013c58 SHA-256: 549d3d0e4f187bcd97dcb3792cb8661ecdfb1c27e1bade7d8cb53f652a9d679e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to educational material to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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://seumenha.ru/wix?keyword=angles+and+triangles+unit+study+guide+answer+key
    • https://cdn.sqhk.co/vadetegubufo/xfiblUg/lafozidopujov.pdf
    • https://cdn.sqhk.co/wanevakaxuma/bmiiBZi/19613145156.pdf
    • https://cdn.sqhk.co/kutajanode/Ndjh1jG/49074699356.pdf
    • https://cdn.sqhk.co/zuvaworizon/FROhchf/lukakisemejigul.pdf
    • https://cdn.sqhk.co/zirixegip/gimheia/daddy_long_legs_venomous_to_humans.pdf
    • https://cdn.sqhk.co/rapurakoke/hdjjjdR/tutifurikilidoxogeturowuz.pdf
    • https://cdn.sqhk.co/punipopi/ageYjhr/tejirusigokolobajuw.pdf
    • https://cdn.sqhk.co/xemuxebu/gLgdEOM/bexakogegejilasep.pdf
    • http://lijonotogi.scienceontheweb.net/52623853367.pdf
    • http://kiwufaninini.22web.org/beams_plus_flannel_check_guide_shirt.pdf
    • https://cdn.sqhk.co/nufolibizer/ijVBwKR/c_compiler_for_windows_xp_free.pdf
    • https://cdn.sqhk.co/wadebekop/agcdifz/49609574141.pdf
    • http://vutunema.mypressonline.com/walmart_tv_65_inch_stand.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/56bca2b1-1dd8-448f-b045-568a03f143e7/57014497446.pdf
    • http://taborodadux.rf.gd/fire_safety_signs.pdf
    • https://uploads.strikinglycdn.com/files/eeef841d-7133-451d-af4c-61ef0053b16f/20003774179.pdf
    • http://wugerubuvugox.myartsonline.com/72446938834.pdf
    • http://bejanifezilo.atwebpages.com/20463749426.pdf
    • http://pobipegosaba.epizy.com/al_nasar_lab_test_report_online.pdf
    • https://s3.amazonaws.com/kuxuxemu/wikenomarimafefewali.pdf
    • http://biwodonugawodil.rf.gd/movierulz_arjun_reddy_movie_free.pdf
    • https://s3.amazonaws.com/lomogas/38291725740.pdf
    • http://taxonan.rf.gd/iliad_book_1_translation.pdf
    • https://s3.amazonaws.com/vobuturinivi/1046800408.pdf
    • https://s3.amazonaws.com/lorugipopuxe/nc_state_employees_credit_union_routing_number_nm.pdf
    • http://rojanesifilagu.myartsonline.com/fufitapemorunalurolib.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f83b.bin
c36dd7cf15414a88cfeb713f9303e1503f2f7f91fdcbf4ac97c04bec1bab8df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF83B 1672 bytes
font_01_sfnt_off0001006d.bin
bb27ced731c90c8ba9a2b3ba042a23a485b79a984689e028bf8b523aa424814e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006D 5240 bytes
font_02_sfnt_off0001126b.bin
3d25a1063a3de8cc2774a0690bc4a1f1f9e2d328611e8fe1d07453146295a247		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1126B 11856 bytes
font_03_sfnt_off00013aa8.bin
ab6a2d92c6195441154fe03e3add47570783810922a3b82dfc3833ffb97f5f96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA8 16072 bytes

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