Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c1b2880871deca…

MALICIOUS

PDF

55.0 KB Created: 2020-12-21 10:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 96f4c17e5e5f621bf71e9fc59bdbb70b SHA-1: 4af8be595b93dbdcefede0f3a00089977e5276e5 SHA-256: e0c1b2880871deca26f90ce4f413dff3cfc541eb795b421899e40527d70fbce7
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to PDF files, suggesting a link farm or SEO spamming tactic. One prominent external URI, 'https://trafftec.ru/strik?utm_term=mini+radio+player+windows+7', indicates a lure to a potentially malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8138

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 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.
  • 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://trafftec.ru/strik?utm_term=mini+radio+player+windows+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388612/normal_5fa8fe824032e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468871/normal_5fd2f0ad79238.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417208/normal_5fcc5ee78b3d8.pdfIn PDF document text
    • https://dojumavuj.weebly.com/uploads/1/3/3/9/133997280/1217605.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366377/normal_5fcd72e826119.pdfIn PDF document text
    • https://refedekejevejat.weebly.com/uploads/1/3/4/3/134312363/fezarine-gubowu-gefoweja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_5f9660fa68c93.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/4e4b72b0-a9f2-4d85-b7db-0d2787c51699/zigenokajivaxilasivuzo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0c5c1972c46e3c66891e/1606290524968/babijiru.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64f46c14dfd36fe165b58/t/5fc7c1f8a038a451bcfa12b7/1606926841262/25747250317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda08eca-b7f8-4cb1-aa65-3ade6b355fba/la_gaviota_y_el_gato_que_le_enseo_a_volar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04027380-c3b4-4e25-b4f0-1420ed266f9e/masemifuzuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aef7a2a-e238-49c0-a163-c5d9db34dd36/unicorn_goat_yoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ebdc0b-dff3-4d4d-8943-0c6b773ef91e/uworld_nclex_notes_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e52d7d-3e99-440e-953f-3e52c8750fcc/fojivagixibitavukesuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab3db73-8026-4819-8765-ac272f2933a9/kamisama_no_iutoori_live_action_sub_espaol_descargar.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_off0000cd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD60 5232 bytes
SHA-256: 3e79d8cd982ccc51ba4e3c30b287040d910fca1ee822684bf6de6ef9a787330f