Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a76323529926957…

MALICIOUS

PDF

77.9 KB Created: 2021-02-27 02:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d8941b61699c076526e467ace736c764 SHA-1: 20e9909a22508a620a3e07817d32a9ea83386561 SHA-256: 5a76323529926957cad82d89626f4154b0c2c0c4198939fa59d49998e0fc1ee3
126 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 numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this phishing intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=naruto+arena+characters PDF link annotation
    • https://cdn.sqhk.co/nosimasiv/gdidChh/square_body_chevy_truck_parts_for_sale.pdfIn PDF document text
    • https://dodarumobite.weebly.com/uploads/1/3/1/4/131437296/6f8070f.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/ujijiqD/viking_island_defense_game.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/mass_effect_andromeda_official_strategy_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501810/normal_5fc725ba5dc7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485943/normal_5fdd8785efa21.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/neil_degrasse_tyson_quotes_the_universe_crossword.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/macbeth_act_4_scene_3_analysis_cliffsnotes.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/my_favorite_things_john_coltrane_counter_numbers.pdfIn PDF document text
    • https://jepexilopenokaf.weebly.com/uploads/1/3/2/6/132680937/286dc5b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460466/normal_6025281b6c657.pdfIn PDF document text
    • https://mezamavizasiv.weebly.com/uploads/1/3/5/3/135312133/kubogojadagifav.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/fOjjj7h/ocean_s_fortune_portia.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/gfjidOS/gikulomunogamisima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_602ff6365affc.pdfIn PDF document text
    • https://rekazisiw.weebly.com/uploads/1/3/0/8/130874265/d5c7610a0e6d6.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/kifiwodaramirejej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokabopexo.epizy.com/how_to_fix_an_unbalanced_washer_drum.pdfIn PDF document text
    • http://fulariponazaget.epizy.com/95977474454.pdfIn PDF document text
    • http://store.nba.com/carmelo-antIn 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_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 4824 bytes
SHA-256: c6b1b51b0c0bb9d8ed06fe3cbcdae0cb7693cc52d03cd0cb334ddaf0f53c9fe7
font_01_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 11532 bytes
SHA-256: de7d96cea73e98927c6dcea31f6d9d63698a61a6c33f52cd438ca9fed401a268

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