Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8dfcde3abb48e1…

MALICIOUS

PDF

69.4 KB Created: 2020-11-10 16:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 2f0caf8d9b8081c54931189f2a4d8b6e SHA-1: f755fd0bf38cdef848fbdcab938ad3244178b3b0 SHA-256: 3f8dfcde3abb48e19e78819b6007dfeb8971c819610318c42df44fec8d3bc821
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/strik?keyword=one+on+one+basketball+unblocked+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424328/normal_5f9dfc3ba0213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5fa33a2cbb779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460975/normal_5fa8ef1d650d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f8e98cda1674.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/pupog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_5f9b12abc4a8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5f94251d49da8.pdfIn PDF document text
    • https://welofubevi.weebly.com/uploads/1/3/1/8/131856084/gutefuvug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_5f9ef4f159ae1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/forupokisip/emerson_record_player_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5852b51-eff7-492f-8e8c-fbf30d7ce81c/envision_math_grade_2_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08eadebd-1fe0-4331-91b0-e39ed66c3ef5/38439422230.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/paralisis_agitante.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8b419f-4cf1-480f-9842-5cd1a0626790/74954018028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66121ac6-99b4-4bca-861e-3555f3408ec7/36331304723.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_off0000d286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD286 5392 bytes
SHA-256: 265908d7a28e6f70407d0c2fe6b72ca0802101f98e175fc45224363c8faa8c65
font_01_sfnt_off0000e4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 10500 bytes
SHA-256: d4672e988eab3af55eb304efe880bf4a925fbbfbd6aa712c624d0211bffa4c8c