Malicious PDF — malware analysis report

Static analysis result for SHA-256 8367af003cf5cc6c…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 09:21:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a7ad316fd111a57af9258b4ec257904e SHA-1: a389e61f474e160bd1e6fb44013432cc02b7bb06 SHA-256: 8367af003cf5cc6cadcc7030256f4a65317b067dff44247820380421262cc8b3
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that is likely part of a phishing lure, attempting to trick users into believing it is related to organizational structures. No scripts were extracted, but the presence of the malicious URL and the ML/AV detections strongly indicate a phishing attack.

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://resalured.ru/award?keyword=decentralization+organizational+structure+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453540/normal_604cc262226dc.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/gdcG6gc/jopex.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/gghhe0K/73251365768.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/BJ6ighe/backflip_madness_mod_apk_revdl.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/murray_snowblower_auger_belt_size4i7cl.pdfIn PDF document text
    • http://alex-chekalev.com/world_war_2_timeline_ks2ywnvm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446388/normal_5ff6921061cc4.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/jczwQg6/espn_plus_schedule_soccer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387218/normal_5ff717c8c928d.pdfIn PDF document text
    • http://samokex.sportsontheweb.net/47320062502.pdfIn PDF document text
    • http://classkaod.ru/how_to_solve_logical_problemsdz4nc.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/jhghKic/pokorazebutivijowi.pdfIn PDF document text
    • http://xosubowavenu.mypressonline.com/hp_elitebook_6930p_drivers_for_windows_7_32_bit_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463306/normal_6008503050568.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_4d88fcca3f2842508c249f1b774c62d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patotale/zivavixibodison.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/nidezejubotugijosokuje.pdfIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_64541949621747af90927f53f0520d22.pdf?index=trueIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_e57ade72b36c445f8e123d6e7afdc34a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawovojo/gameboy_emulator_android_games.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/79520480504.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/formation_chauffagiste_agr_bruxelles.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_off0000fa71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA71 5372 bytes
SHA-256: 104a121568318f1b7fe7a340c807f69543558f2a0aceb40590f710130dce3528
font_01_sfnt_off00010cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD4 10460 bytes
SHA-256: 07a4283ab013d7125591eb11ec2e7dc8413d907e248975ec23408d654df06c79

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