Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a65967780cda62…

MALICIOUS

PDF

50.3 KB Created: 2020-11-07 08:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 712187eda96853ea270fa1ad270377f6 SHA-1: be32af46bc2fa9a02ba329cb1a2323a5416fafe5 SHA-256: e6a65967780cda624bf76e0fb0d072a86f4d9f20581f8819deda439e2e63bbf3
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://traffmen.ru/123?keyword=pal+stewie+references In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f87c50fbf3c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f8d25c2dc8a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446034/normal_5f9e7f6207350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f90918d20b5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450513/normal_5fa092c8dc5bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8a46b7d9432.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xanafegeze.files.wordpress.com/2020/11/rinizapowos.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/966be0ec-098b-4992-88a5-87f6dca46909/sizojabomasiwabanaboz.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_off000086cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CD 4968 bytes
SHA-256: 737beffbc5245f1769870c171f1a6820eb9079526e7f908f410e75b6804bc31e
font_01_sfnt_off000097d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D4 10868 bytes
SHA-256: 65ab692a8b3062e15d368fdfbd7e06c96ebe34a94b94d6dadc6bb5dcddee8d06