Malicious PDF — malware analysis report

Static analysis result for SHA-256 60469177cff8955f…

MALICIOUS

PDF

85.3 KB Created: 2021-04-01 09:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b0e9ca4cbe72f69f9dc130c66e6f865b SHA-1: 285b104ba062a588eb2c64e85771ba9eba7291aa SHA-256: 60469177cff8955f7194882e5ac6c536d14918c6f579c6473d5497e99cf3a0da
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely intended to trick the user into downloading a further payload or visiting a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often abused for creating malicious PDFs.

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://leonvi.ru/award?keyword=awk+command+in+linux+with+examples+pdf PDF link annotation
    • http://wacc-cat.org/233934444122de2n.pdfIn PDF document text
    • http://nukels.xyz/fodaguwudovepuvaxokutifm991.pdfIn PDF document text
    • https://cdn.sqhk.co/butofelo/KRjhLii/play_chess_rush_on_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/fhe9Oje/comedy_central_app_roku_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_60432299d6050.pdfIn PDF document text
    • http://profit-makers.club/fitbit_charge_hr_charger_nzwfzia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5fda7141bfc89.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/eVgdbFA/zombie_3d_gun_shooter_hack_game_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_cab1ed4fc4384455aea2b6c57ad55626.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b35efe-48ce-4812-8de4-47f634f07418/marlin_81_dl_stock.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/suzigosunibi.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/subject_verb_agreement_worksheet.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_00decf344ed24adeac21e86ef2b3fc89.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d3c161-8423-4bec-87db-2410eec607ec/is_ryobi_a_good_brand_for_pressure_washer.pdfIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_95d05a2a6ad04f4e9c59310180da32bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/how_to_change_genie_keypad_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f74f19-a8a5-4884-bf0f-1e70484d2b7e/fituwave.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/uil_calculator_applications_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/albanisch_deutsch_wrterbuch.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_off0001084b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 5512 bytes
SHA-256: 2c4f925bd2b7fd85c7c7558b3e315d413516e380a6a3fe9a626cd5f72a22385a
font_01_sfnt_off00011b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B01 14224 bytes
SHA-256: f509939817abc4b28afe52ad095a0092d897ef359599ee41af6e8968560a3bf1

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