Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fd668a0ce7eb46…

MALICIOUS

PDF

79.3 KB Created: 2021-06-02 09:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 93200af4ff22e9f3babc7a9a6f8a266c SHA-1: f9e311d79f9ed9d285e55d950f28e9633c4a6a44 SHA-256: f2fd668a0ce7eb4601b7b0a20d4b95fc6f5023d450d2a3b7bece48c4c8abe83e
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains, suggesting a link farm or SEO spamming operation. The primary lure appears to be related to 'Mortal Kombat X fatalities codes PS4', directing users to a URL on huntic.ru. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to drive traffic or potentially deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://huntic.ru/pbw?utm_term=mortal+kombat+x+fatalities+codes+ps4 PDF link annotation
    • https://medekegiloninev.weebly.com/uploads/1/3/4/7/134716174/39fe37b35.pdfIn PDF document text
    • https://bepikirutufuw.weebly.com/uploads/1/3/4/8/134866592/7332360.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6927e6d-56d1-41d8-95d8-e147ff04c826/9087886740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066dd60e-8fdc-4114-a8f2-9e7219251368/merit_badges_online_classes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9031d18-6df5-4619-962d-19e6e5c54748/rivoguxav.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/8776626252.pdfIn PDF document text
    • http://xugilip.pbworks.com/w/file/fetch/144487113/tivos.pdfIn PDF document text
    • http://paditoxef.pbworks.com/w/file/fetch/144485697/music_idioms_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba369105-ba7e-4102-8cea-38e3256d1c4d/wajofoturip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0f4b39-bedf-408b-84a9-b4cb8f361907/fast_and_furious_5_tamil_dubbed_movie_download_in_isaimini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06710e08-0ad7-438b-a1fb-e626aace5338/where_do_i_find_the_disney_princess_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10722e55-a510-4b40-a10b-e1afbf950f1d/girl_interrupted_movie_vs_book.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/f/jikisotumeja.pdfIn PDF document text
    • http://wusagem.pbworks.com/f/bomofamadunilagif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24fe0bad-e653-4619-bb76-7388d4ce84c2/tabla_de_densidades_de_solidos_en_kg_m3.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/f/gosimukubajajaga.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/f/isabella_lullaby_piano_sheet_music_easy.pdfIn PDF document text
    • http://kivupored.pbworks.com/f/318233320.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/21072436905.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144426354/lukujenulukonojimus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739b01d0-0f25-4bab-a6bb-ed6ee63ad066/1833060372.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/f/exercices_fractions_4e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6b9f44-8248-48f1-a8ff-8803bc9c74eb/10680351900.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_off0000f90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 5664 bytes
SHA-256: f077a26f2ca17ba6c678bf55081094c5d8c8b73c6351165108f9b9a94b49608a
font_01_sfnt_off00010c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C49 10664 bytes
SHA-256: 669e9ff81940b1b6b0a2d40a2ba18bae33e90d59f3923e5720f2b7747b40ee7b