Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af049f65ae43449…

MALICIOUS

PDF

42.5 KB Created: 2020-11-07 11:30:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 55129896b621efa1c8221bde1c764bb1 SHA-1: 9ad9e80e19c63d69cc8b4965c92720b6536d45c6 SHA-256: 4af049f65ae43449224fbbcc915705cea87f14849c890e54411c6f7dab408dc5
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/wb?keyword=adobe%20middle%20school%20staff PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5f8c3ad284cd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f92175b563c8.pdfIn PDF document text
    • https://zoxuzula.weebly.com/uploads/1/3/4/4/134489613/surezerafuvapazag.pdfIn PDF document text
    • https://kawewadibuporak.weebly.com/uploads/1/3/4/3/134371142/suponukejez-mutizaki-pezabekuvojosaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0ca1fa09-5c90-4f5a-82ea-b59a71ae9f23/cobra_microtalk_walkie_talkie_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4617d83c-7e0b-4f67-9b09-e2a8ece63831/sanam_teri_kasam_full_movie_mp4_down.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/blink_gladwell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeba2a4c-b561-4357-8ae4-379abf09b4c9/kalinibepotefog.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/22688922797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c02e60-281c-4265-88af-d3986534ef25/grandma_got_run_over_by_a_reindeer_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42c8b65-b42b-4e0a-bb89-7de7d39eed5b/nisotenowiguravuzetomiluj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ecce1d4-d584-456d-bf25-5d74f132d48c/ziwudogopotadagibe.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/15369315770.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC1 4976 bytes
SHA-256: d702ea66454dab08aa6b46b29d639ff50ff5c197ef1d12d375b7203ebd1e23f1
font_01_sfnt_off00006caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAA 10152 bytes
SHA-256: a6e45f6b21b892cb090dc51a7a0ab43ae9673554f105c258d6bd6d054baa69f2
font_02_sfnt_off00008f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F60 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34