Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc4336f7d4fa4b3…

MALICIOUS

PDF

77.5 KB Created: 2021-03-18 12:38:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3fd65a6d39e6d910b8d9b664c05ffc3b SHA-1: 98a8c886ee187f56c3d3b7bb41bdfca64a57b953 SHA-256: 9fc4336f7d4fa4b35fcebb1fef9136583e19b41a3edd370eb68f6e4d2523c15b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/wix?keyword=ciclo+del+nitrogeno+caracteristicas PDF link annotation
    • https://cdn.sqhk.co/jokawefezo/GNbgqic/wordup_vocabulary_of_english.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/cidHYth/cube_dash_cam_camera_terbaik.pdfIn PDF document text
    • https://gorasamigizutod.weebly.com/uploads/1/3/4/6/134600185/9d10b2f.pdfIn PDF document text
    • http://pekibexuvipeve.scienceontheweb.net/divergent_movie_download_in_hindi.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/chess_puzzle_solver.pdfIn PDF document text
    • https://cdn.sqhk.co/pimetezefo/ehdhdjg/drill_down_chart_in_excel_2016.pdfIn PDF document text
    • https://boderaraza.weebly.com/uploads/1/3/1/4/131454415/905aff7c.pdfIn PDF document text
    • http://muwazowezijowa.22web.org/97957278607.pdfIn PDF document text
    • http://fabujisaw.mygamesonline.org/intertherm_furnace_installation_manual.pdfIn PDF document text
    • http://bamimutekinawaz.22web.org/nuxajileradobajepigazut.pdfIn PDF document text
    • https://voloripilobolim.weebly.com/uploads/1/3/4/6/134635915/sonofotafenal-xulukawetidi.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/materia_y_energia_oscura_del_universo.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/mfQieu1/audio_toolbox_matlab_tutorial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_ee1a409109284403a6ab0dc09b983683.pdf?index=trueIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/terapia_genica.pdfIn PDF document text
    • http://wigamewekafon.rf.gd/58491156635.pdfIn PDF document text
    • http://naxefugoxodikow.atwebpages.com/vorifekebimevidefidu.pdfIn PDF document text
    • http://ruvatarojamun.rf.gd/nuraxumuribikatazejeze.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_ddf67ef6b6334f36ba997705cc1ba4f0.pdf?index=trueIn PDF document text
    • http://jabodegodonirad.atwebpages.com/dyson_dc25_animal_manual_instructions.pdfIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_2cbe4ab41d0848c6a950a8dc981058a5.pdf?index=trueIn 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_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 5012 bytes
SHA-256: 75f4b26e82b66a031ad9c93085fcfa7639ebfb23e71fe22ef09efd1436169234
font_01_sfnt_off00010083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10083 11764 bytes
SHA-256: fe226c2834e42e5b8c437844bb5bbf97877c93935615d3c255c0c4cf6ae087ea

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