Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7fd0e324cf99b9…

MALICIOUS

PDF

65.6 KB Created: 2021-03-07 13:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e393e3ef6150c553b6cc1fe12fd503fc SHA-1: c8ddfe4ee43fc7938519a0074bdab0609983bc32 SHA-256: 8a7fd0e324cf99b9208746ba159f8a961c4098c3da84bec46311db60c6abcbdc
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a high concentration of them pointing to disposable hosting services, indicating a link farm designed to obscure the ultimate destination. The primary malicious URL identified is https://xezojetit.ru/strik?utm_term=ti+82+vs+ti+84, which is flagged by heuristics as a potential phishing or malware distribution point. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8307

Heuristics 4

  • 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
  • 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://xezojetit.ru/strik?utm_term=ti+82+vs+ti+84 PDF link annotation
    • http://tesekitogibop.22web.org/95339495302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466676/normal_602af6b2dd420.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/787904090384z38k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460725/normal_5fcbd5c34d039.pdfIn PDF document text
    • http://austritkfa.com/free_applicant_tracking_excel_templateymvku.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/cd697e28-2165-4c22-b324-addf51975f4d/nabajatojuluwifavuboxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1975e1c-8821-477a-a311-cc016799f9f7/69344478777.pdfIn PDF document text
    • http://dipuritaxuxok.rf.gd/why_is_my_dog_licking_her_paw_raw.pdfIn PDF document text
    • http://siwojanapav.epizy.com/zamapep.pdfIn PDF document text
    • http://bowapediwimelul.epizy.com/the_book_of_enoch_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037b015d-cc93-4557-8a44-19fb11430419/tufiliguwamajulomaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51e2350-6c52-4b6d-82b9-6ab3c319262e/network_security_basics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb0dfc77-5b5f-4899-b7dc-cecceb9b6aeb/besigufifimajotib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc1d9dc-ca8b-4ffb-99dd-cff47c77932d/libro_de_estudios_biblicos_para_nios.pdfIn PDF document text
    • http://litufowanukoro.epizy.com/55902497217.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 4764 bytes
SHA-256: 36b9b3a8d84d4fe8d11ea969ecfdcc826b32016d09164a9d4ee9ab903f9b89aa