Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b92588cf977c996…

MALICIOUS

PDF

73.5 KB Created: 2021-03-21 01:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b98e6266fe3fcf3d8d2ed9cf58afa0a SHA-1: 3064d4da282bdc8e2111802b27ecd44c3632193f SHA-256: 7b92588cf977c99667fdf2e5a546eb726d61c95b3ef12127db61ff86105d806f
136 Risk Score

Malware Insights

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

The file is identified as malicious by ML classification and ClamAV, with heuristics indicating an advance-fee scam lure. The document body, though partially corrupted, contains text related to 'data structures' and mentions 'wkhtmltopdf', suggesting a potential lure to disguise malicious content. The embedded URLs likely lead to further malicious content or phishing pages.

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://kuzutuzo.ru/strik?utm_term=data+structures+using+c+and+c%252B%252B+pearson
    • http://kudusakepupa.sportsontheweb.net/denuzedetar.pdf
    • https://cdn.sqhk.co/tezesafura/cWgiXia/sabemomesovu.pdf
    • https://cdn.sqhk.co/jopubelo/zjjghji/kuzefuzeb.pdf
    • http://jesofoma.getenjoyment.net/52829270729.pdf
    • https://cdn.sqhk.co/muzexeragod/boiikas/zemaxumopiwobarisupuve.pdf
    • https://cdn.sqhk.co/mamevugixej/hfijVic/vulozobatozo.pdf
    • http://zexitekaxob.mypressonline.com/blechtrommel_download.pdf
    • http://wedevaz.sportsontheweb.net/present_perfect_past_simple_lesson_plan.pdf
    • https://cdn.sqhk.co/zosiwikiw/2hgOpmE/basketball_times_tonight.pdf
    • http://favodokoleti.mypressonline.com/pink_panther_alto_sax_sheet_music.pdf
    • http://loduwij.scienceontheweb.net/42853644955.pdf
    • https://cdn.sqhk.co/wubunepan/dcjdhbF/78112581550.pdf
    • https://cdn.sqhk.co/sifajoxojif/jd3I7ji/empires_puzzles_epic_match_3_holes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tanonarimunal.myartsonline.com/87100700303.pdf
    • http://nasuxenabo.epizy.com/sobatesorodekevuzefaraduk.pdf
    • http://bubewap.rf.gd/toshiba_sky_q_remote_codes.pdf
    • http://lawaxisagiwog.atwebpages.com/28049799254.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d42e.bin
d527565314509b9d68f730b50f9693e61f1d8f0211ea8b8468fe944561a4fe76
pdf-font-stream PDF embedded font (sfnt) at offset 0xD42E 5092 bytes
font_01_sfnt_off0000e585.bin
23522ee3a27bba62ae850a0d12b1e000878dcf2ccb9b4e3fbb5b61b5f202e236
pdf-font-stream PDF embedded font (sfnt) at offset 0xE585 10488 bytes
font_02_sfnt_off00010924.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10924 4324 bytes