Malicious PDF — malware analysis report

Static analysis result for SHA-256 374f8b19aec72747…

MALICIOUS

PDF

77.0 KB Created: 2021-03-19 09:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90f22178d4cb08138135d244f0637822 SHA-1: 5100133a355f029c9e4788464c3c3a3e113f2480 SHA-256: 374f8b19aec72747534fbaad8800a70ce09fee54c6757e9bd6c2878f579e0401
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, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that mimics a download for 'Adobe PDF reader for Windows 7'. This suggests a phishing attempt to trick users into downloading malware disguised as legitimate software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=adobe+pdf+reader+for+windows+7+download+free
    • http://cancandance.org/physicians_desk_reference_201776c1k.pdf
    • http://zokidinodajives.getenjoyment.net/royal_navy_training_aircraft.pdf
    • http://accueilcmb.com/how_to_read_a_poem_hirschp9u7l.pdf
    • http://ruwemipuwev.mypressonline.com/fexawovuxalawosav.pdf
    • http://dadivasim.sportsontheweb.net/active_and_passive_transport_in_cell_membrane.pdf
    • http://roxetoxuved.mywebcommunity.org/cause_and_effect_essay_about_fast_food.pdf
    • http://steblin.pro/pejulojelolilir4gid6.pdf
    • http://mixutadumekaje.mypressonline.com/bivemekuta.pdf
    • http://tadajixilatu.scienceontheweb.net/security_risk_assessment_report.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gevorewububew.epizy.com/sodium_chloride_0._9_safety_data_sheet.pdf
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_f01ecbffd7014b3983b6d3747590bf8a.pdf?index=true
    • http://jebufatibakuv.epizy.com/jj_benitez_caballo_de_troya_3.pdf
    • https://uploads.strikinglycdn.com/files/713b87bb-8432-4215-b388-e531ec41ae4a/can_i_learn_korean_in_6_months.pdf
    • http://dokudaruriwiv.atwebpages.com/96458060119.pdf
    • https://033f1a72-e514-447f-b44b-9d234b37386c.filesusr.com/ugd/f05202_0684ad6250a94d0b9b4700b5134660fc.pdf?index=true
    • https://f270a619-8d23-4dc9-95fa-a4320df4b75e.filesusr.com/ugd/7bd364_95be1464aced42d2b350e0fd87ce23a0.pdf?index=true
    • http://robowogutalopet.epizy.com/powerpoint_smartart_templates_timeline.pdf
    • http://ditipeso.epizy.com/barnstorming_performance_meaning.pdf
    • https://uploads.strikinglycdn.com/files/10af678c-6ba6-48ba-8214-114caae14727/cuales_son_los_fundamentos_del_voleibol_wikipedia.pdf
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_b41951a2c399493eb5b0d8135d6f9cda.pdf?index=true
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_8b1fe9c03d5248efb994013c118110a8.pdf?index=true
    • 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_off0000f146.bin
0dded6c3985ac4b5fe171568391937b06fd461ab680dbc8ab85d1d7a4c55c595		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 5336 bytes
font_01_sfnt_off00010390.bin
53dab99ed7be75de59582ac0c0272a5caa9c413c3401aafc5b9921c4113c52cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10390 10204 bytes

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