Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ddb7877355638f…

MALICIOUS

PDF

64.2 KB Created: 2020-12-17 23:45:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 1da588971c7ecda3ddcd85b1d532210a SHA-1: bd46b33c31afeb8e05c60a7c77f217aa4bd38441 SHA-256: c5ddb7877355638f09f4fd3a111dc218a4292c8e766fb94729c52d20a74f3f23
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/wb?keyword=biomedical%20health%20informatics%20salary PDF link annotation
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/2a41cffdf17f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5fbce55915f33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487382/normal_5fb5725420ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fc20e1466038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5fa80f6112d5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_5f9cfb338b6ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422627/normal_5f9d4edaaeb04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5fa04ca821a67.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/8225432.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e73542c-09e8-4617-8d37-cf4f1d59c8b3/76607391949.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_off0000be76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE76 5412 bytes
SHA-256: c021cd232046a0b6a4bce280085a6727d786a8bda35f552eee36b70efb3abae4
font_01_sfnt_off0000d0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BA 10472 bytes
SHA-256: 0338b32918b8d20ab7bd818909270b93fd4daf30ead2bc6cd8ae8f3999643836