Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d74056ef4ed443…

MALICIOUS

PDF

87.4 KB Created: 2021-03-22 02:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ee57629944bac05299db41d23d3cd7a SHA-1: 1e875b79b2ee4ddcdff47aeb4b8cba3dd8f4979b SHA-256: a1d74056ef4ed44358af755b32fec27e73f938c438ffd6a46bb1ecd70b55b042
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit users seeking information, leading them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://seumenha.ru/award?keyword=guitar+basic+chords+for+beginners+pdf
    • https://cdn-cms.f-static.net/uploads/4479938/normal_601744ae3395f.pdf
    • http://pemirok.22web.org/39898493761.pdf
    • http://dalojel.22web.org/serejekarugabatojoxan.pdf
    • http://wugegifa.getenjoyment.net/understanding_building_automation_systems.pdf
    • http://rakapugijumub.sportsontheweb.net/actionscript_3_reference.pdf
    • https://cdn.sqhk.co/kekumumaxow/Wjagcvc/tekuzedulatejofabopirizo.pdf
    • http://mojadejazisapa.sportsontheweb.net/bluedio_ufo_plus_pro.pdf
    • https://cdn-cms.f-static.net/uploads/4451355/normal_603fd3362a9d5.pdf
    • https://cdn-cms.f-static.net/uploads/4412778/normal_5fd0e3c512514.pdf
    • https://cdn.sqhk.co/regisanozoxo/aXgcv3p/figazad.pdf
    • http://busuvogonateja.22web.org/apache_http_server._exe_free.pdf
    • http://goligofalu.medianewsonline.com/wusanelejidozetujapepufo.pdf
    • http://milatepe.medianewsonline.com/gigogutetagute.pdf
    • https://cdn.sqhk.co/kixarozikej/hinF3P2/fun_runner_for_sale.pdf
    • http://populiro.iblogger.org/robert_fagles_odyssey.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2982e18a-05e5-4016-9363-e9898f76113a/79492335771.pdf
    • https://uploads.strikinglycdn.com/files/9e673364-bebf-48a0-9969-277bab093012/1694574447.pdf
    • https://uploads.strikinglycdn.com/files/46a0592e-78df-4cf6-a4b1-cff1178b3034/personajes_principales_de_la_gallina_degollada_y_sus_caractersticas.pdf
    • http://gosaduzunake.myartsonline.com/ge_profile_spacemaker_2.0_microwave_parts.pdf
    • http://supajiwa.myartsonline.com/cancer_de_mama_prevencin.pdf
    • https://uploads.strikinglycdn.com/files/e87d6349-b6f4-40c7-b01b-fe817f059538/2061375665.pdf
    • http://livirava.atwebpages.com/what_is_the_most_powerful_tarot_deck.pdf
    • https://uploads.strikinglycdn.com/files/b4977a19-e432-4255-93c3-2ec651e99a7a/pewipifagulif.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa37.bin
8ff69e1e6665f185d52e382bf69a2128fa12d4bbbcb57a627e69dc0092066eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 5556 bytes
font_01_sfnt_off00010d11.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D11 1800 bytes
font_02_sfnt_off000115a1.bin
1768440fcce9cac84262e79570c21bd76b10676152d76d254a756b7b992e2350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115A1 10576 bytes
font_03_sfnt_off000139ff.bin
00468df452218f546d59995a7cf9b4297092e2fd476dbd2f6ce79846bd051107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139FF 16140 bytes

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