Malicious PDF — malware analysis report

Static analysis result for SHA-256 e505172fe75dca3e…

MALICIOUS

PDF

62.8 KB Created: 2020-11-06 04:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e04737dc28a9e1f0d4e499208a93284b SHA-1: 636ac71f25ff14c31cf5cef93c4257e9e1747c0f SHA-256: e505172fe75dca3ef04a55d3ee1ef449ff514807433ee05d90cee6371a8c13e1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ggtraff.ru/123?keyword=death+of+isoroku+yamamoto In PDF document text
    • https://papokerudinex.weebly.com/uploads/1/3/4/3/134310480/zidesebapobivok-tevinemolamazi.pdfIn PDF document text
    • https://galavalo.weebly.com/uploads/1/3/4/4/134464717/7023641.pdfIn PDF document text
    • https://rirusiwox.weebly.com/uploads/1/3/4/2/134265342/rowopisuniriroxa.pdfIn PDF document text
    • https://nenojidadexodu.weebly.com/uploads/1/3/4/3/134351563/3ea8a8b.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/3b2cc112.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/jedaxopopuko/94521605529.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/2018288131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b551ce-29f7-4b4e-9345-aaba1db5081e/92693497674.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/pimowitotoxonokoxezus.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/vamavowezelopukopiwiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f12053-2958-42ae-abba-f1125e1d6cf4/50323603901.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/mejiluxazuza.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/rival_ice_cream_maker_manual_2202.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_off0000a8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B6 3992 bytes
SHA-256: 34edcc391092808f3edddd1ea2a3c8c57427fa9487de419d93e0bc6e84bfdd56
font_01_sfnt_off0000b6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A4 5140 bytes
SHA-256: 0d322032172847216a0e172c9dce76dc658bfa4a36e7eee2a0a45654cc7a757d
font_02_sfnt_off0000c80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80A 11384 bytes
SHA-256: fdb844c8df4f5d3fdb529499390ed5b515ea7248af8bc92cbc7ac19c5391a1a2