Malicious PDF — malware analysis report

Static analysis result for SHA-256 92946fdf0e4eeb0b…

MALICIOUS

PDF

68.7 KB Created: 2021-03-12 21:25:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 02fed57c0cee0cbdfbea506d0ce705c5 SHA-1: bfa7c7b8d47c8385cbbffa2a0f462346127c55d9 SHA-256: 92946fdf0e4eeb0bcfc156eb115301bb862e4980cc477981be3da8cd5704b824
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One prominent URL is https://leonvi.ru/strik?utm_term=the+vampire+diaries+gif+imagines, which is likely part of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=the+vampire+diaries+gif+imagines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404123/normal_602edad07ace1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480878/normal_5fdefd1c02bde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_5fe8f5912a5d3.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/descargar_happy_wheels_android_apk_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_60490c1905580.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/cshWgdz/pharaoh_bubble_shooter_maniacs.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/egct67b/90866530404.pdfIn PDF document text
    • http://tapovapusewirol.iblogger.org/mopafivefokoguxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_6046b667745d0.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/73900d3e-68c7-49a4-b104-2448437afc09/zuvukukavuzamegovij.pdfIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_ceca5651a34b44c2955aacae33db88bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7601166-4216-42e7-b923-b56898e7bdcc/epson_3020_projector_price_in_india.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_0a2f168d3e024be58a461a3666d2d765.pdf?index=trueIn PDF document text
    • http://nijetazum.epizy.com/contra_el_tiempo_agustin_garcia_calvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f353bfdf-8584-4581-9cbc-afcc9185b67a/where_is_midwest_located.pdfIn PDF document text
    • https://7043ee2c-bc2d-4d46-b82c-b0075177c1aa.filesusr.com/ugd/f862b5_b8b487749fc4497783c5c8eb9b19f9cd.pdf?index=trueIn PDF document text
    • http://puxetedategekex.epizy.com/84461158936.pdfIn PDF document text
    • https://520c840f-7702-4e28-87de-278da5b03b63.filesusr.com/ugd/e633b3_375d66218e94436da37e10288feca96f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e37c9a6-4f00-4a0b-955c-e2c2d0c5b706/lawizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb35d6c6-39e7-40a7-8654-096486b78ff7/25691001154.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_44d693079a7d46958ac761dcaff5012c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b10c5c-a48c-434f-971a-5d1e1ab80be3/what_is_the_difference_between_dyson_v11_animal_and_torque_drive.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_off0000d291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD291 5432 bytes
SHA-256: af2d74ed8e49a024f600e1b91010a7061130091d8ddb47040eb880649c83d82b
font_01_sfnt_off0000e4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E7 9664 bytes
SHA-256: cbe595c362837d4766d7b186c3bc884f6b207b591bb83b08d7c292b184032cb9