Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b2323a7a5dfe7b…

MALICIOUS

PDF

75.6 KB Created: 2021-03-28 21:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fe4789fc9e09e0c8783e971d4dec2e9a SHA-1: 79deb9cad15f8f61b56bd54491eacfbffce4ebb4 SHA-256: f6b2323a7a5dfe7bce7b3d1d8ca4097966ae735e61f3964e58e7bfc14f57eb6d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a disposable hosting service and another to a domain associated with link farming, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a commercial lease agreement.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=contrat+de+cession+de+bail+commercial+pdf PDF link annotation
    • https://tifidanubaliso.weebly.com/uploads/1/3/2/7/132740836/jadopig_jodixidarisive_mixebusexeri_jemosojabumil.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/kezemitelak.pdfIn PDF document text
    • https://bexubefobex.weebly.com/uploads/1/3/4/4/134476762/9f4799738.pdfIn PDF document text
    • https://fivoputan.weebly.com/uploads/1/3/1/4/131408393/3086078.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/dunafug.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/which_jlab_earbuds_are_the_best.pdfIn PDF document text
    • http://tulumiv.medianewsonline.com/web_gis_development_tutorial.pdfIn PDF document text
    • http://fopekoriw.sportsontheweb.net/gatazuvipuvikorelexu.pdfIn PDF document text
    • http://gopadaxin.mywebcommunity.org/37934154670.pdfIn PDF document text
    • http://jagefefixod.22web.org/87989818313.pdfIn PDF document text
    • https://fugokepak.weebly.com/uploads/1/3/4/8/134856046/6307439.pdfIn PDF document text
    • http://duwosolutanuz.mypressonline.com/jepujepikazurapade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wivonuwexewixir.rf.gd/baraka_the_prince_mawazo_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7b46f7-7c43-44c4-abb7-2d7c2c49b71c/how_to_program_chamberlain_dip_switch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c4f117-1dc7-41d3-9dcb-f1bc9a121e95/fotomutisawarururanupo.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/miwevokade.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/73871905600.pdfIn PDF document text
    • http://vifudirowu.rf.gd/transformers_dark_of_the_moon_autobots_cast.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_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 5344 bytes
SHA-256: 3d36b83b44bb51219341495e969977177022b0b0a37f7a6b01f05458507afa64
font_01_sfnt_off0000f86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86A 12072 bytes
SHA-256: 19b29656fa8ef3f52b7b23337e2aea6018948c510f6e8c172021fa8005e6f57a

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