Malicious PDF — malware analysis report

Static analysis result for SHA-256 364572d40f886f59…

MALICIOUS

PDF

81.0 KB Created: 2021-02-27 21:33:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b93d8bc213b4aa42202ee42bd5bb0c32 SHA-1: b0d4c55c2fa0604b4fdc02d2bbcae13dcc7e8c54 SHA-256: 364572d40f886f5904945e3d48ef55bb93de31fd60199949811ac1b5c3b715ac
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=how+would+you+describe+a+thunderstorm PDF link annotation
    • https://kimodoximotoden.weebly.com/uploads/1/3/1/8/131856266/2878517.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/basic_english_learning_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/ig8hbLa/61735773142.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/homemade_3d_printer_plans.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/why_did_my_keurig_stopped_working.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/how_to_play_life_online_with_friends.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/ficidhh/appblock_stay_focused_block_websites_apps.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/38151438934.pdfIn PDF document text
    • https://cdn.sqhk.co/gevagedubop/hiRkRjd/fall_guys_switch_costo.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/9093648.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wolobugoxew.myartsonline.com/zitebozivawatenutetasoza.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/bose_bluetooth_receiver_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/nupazuwuvetamatomerevut.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_off0000fdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 5472 bytes
SHA-256: 8c4b0a79e4153c880fe7865acadc5573343233059146a6994bb8dc010b3fd706
font_01_sfnt_off0001107a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107A 11412 bytes
SHA-256: 64bf51213f9b0438392223a2c3a22ff6bae5f910de1770323297fb7d6203da49

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