Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f018b5567337c6…

MALICIOUS

PDF

75.8 KB Created: 2021-04-21 00:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f6f31863b8075978c514015f6a2044cf SHA-1: d0af6f960495b46332477aa2d4bbcc576f6e6067 SHA-256: 52f018b5567337c62edc32a38d33d6c349fdba2f9b0879bb8e0f371be231ffda
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically identified as a potential phishing lure related to 'military opord format'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/strik?utm_term=military+opord+format PDF link annotation
    • https://cdn.sqhk.co/roretuduva/hfiehgQ/emporia_real-_time_multiplayer_war_strategy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/rtF9ifJ/pozasanididafozo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446027/normal_5fcc9c03b205e.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/dljcid2/nefipobasojiwixomemapifij.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuvobu/qhigdja/25805512654.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_600610f9f2782.pdfIn PDF document text
    • https://cdn.sqhk.co/zopezepazedo/ii3ra6l/94361365839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fdbb6cab70e4.pdfIn PDF document text
    • http://jijufik.22web.org/56698200262.pdfIn PDF document text
    • https://cdn.sqhk.co/xovopebe/kABhhNS/wavozetiwurarijedorofa.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxixixixi/gfphh2v/dijejewifivefoferubavifol.pdfIn PDF document text
    • http://ripuvajuze.iblogger.org/examen_toefl_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tigadikem/jfJcES0/chrome_for_ubuntu_16._04_32_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/nufomewo/fibgjaP/palabras_que_tengan_acento_en_la_penultima_silaba.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/ijifLib/frogger_golf_brush_review.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/eRhdjhO/download_game_stick_z_archer_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413346/normal_6002d27b80658.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suwinateno.epizy.com/download_ayat_ruqyah_syariah_full.pdfIn PDF document text
    • http://vewofosel.rf.gd/online_game_8_ball_pool.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/blank_handprint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/tecumseh_engine_ohh60_throttle_linkage_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/twilight_piano_music_free_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/fate_extra_ccc_guide_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/70759426122.pdfIn PDF document text
    • http://zofuratav.rf.gd/algorithm_analysis_and_design_notes.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_off0000ebcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCB 5116 bytes
SHA-256: 609df8b7550ee397b1d7bc7246d2166012bffcf1664187424f3e4f5c4e685b04
font_01_sfnt_off0000fd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD38 10840 bytes
SHA-256: 41c1659b66366bddf3cd387263c1ee1c12e97d867645c8c559c922d79c6ce9d1

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