Malicious PDF — malware analysis report

Static analysis result for SHA-256 25bd311cd4ec66ab…

MALICIOUS

PDF

41.9 KB Created: 2020-11-05 23:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: cbae8bdf8f37919f698846f42d4b9e2a SHA-1: 9ec8c273f8415e8999d7c9af5e7b863f061bd960 SHA-256: 25bd311cd4ec66ab9794a996c72625c667dc900c491c293f859c4661acc8fff4
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/strik?keyword=transparency+paper+type In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8e8acccb4ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f87e60a94ca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_5f956e60922b0.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/tetazino/zobedebigil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18fcf9c-6a46-415d-8947-72dc1aa6b7bc/78513682556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f541ac-79e8-42b8-95bf-4be31df644b9/yeh_rishta_kya_kehlata_hai_ringtone_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6aa8060-ae2e-4237-919b-c85b9763b20c/wosegumuxitobav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e29f006-483e-4d26-93e2-faddfd806c6a/fumewononewawikol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/151cb573-76dc-4213-85f5-9c4a3be194c3/fifabebisizogefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a3b0cb-ea8b-48f1-98be-1cabc35009d3/litavirixowonoja.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/clover_hill_farm_va.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_off0000678a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678A 4948 bytes
SHA-256: e8ce6a8337c1149c11efa5a782e28993e80022e525aa86931f7edf0b5ff99ec6
font_01_sfnt_off00007874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7874 10280 bytes
SHA-256: 3f5c3ad7274bfd41bd885294939c1077d1889d4e407645feed47eb83b118fe68