Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9937f958e1ec2f1…

MALICIOUS

PDF

58.9 KB Created: 2020-12-02 22:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-13
MD5: 9a26323ac07f414a3f9c8ef2b3f262ae SHA-1: e90b1105dda6f5f8a7fd497385265ac5ed8c2eaf SHA-256: f9937f958e1ec2f1ba0ab35fbfe7914e301e90643ba20ead2a621e316aa83bfb
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=yarg%C4%B1%20anahtar%20kelimelerle%20e%C4%9Fitim%20bilimleri%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5fa1442c55b1f.pdfIn PDF document text
    • https://xirazaju.weebly.com/uploads/1/3/4/8/134859293/769afc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f9ddb84a4873.pdfIn PDF document text
    • https://nugaginidej.weebly.com/uploads/1/3/4/4/134475369/mesoba_gazomusalag_rusumo_rigukigo.pdfIn PDF document text
    • https://gupenuwod.weebly.com/uploads/1/3/4/5/134518336/c5edb9a7959d69d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f943d3f3d7d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f899f76a2e1c.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/8836314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392873/normal_5f9c9e34bb83d.pdfIn PDF document text
    • https://kekisuganuzab.weebly.com/uploads/1/3/4/7/134721312/goruwuzudakome.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/29c876b6-50fd-4bb2-8628-a75afb5160e7/xikaluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e38ed4a5-bf09-4fd8-b122-da5e4414ac1a/85612833333.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_off0000a78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA78C 5704 bytes
SHA-256: 58218f029c92b06114072abf5c5064a9432d8fb05eb62cb4a1eb0f6dfc107182
font_01_sfnt_off0000ba57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA57 10712 bytes
SHA-256: 6b1ad204c94f1da87d1704abee0b97a41f1832f84018140d310898ff1a430c5c

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