Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f3eeeafa5f7686…

MALICIOUS

PDF

66.6 KB Created: 2021-01-16 04:52:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-19
MD5: edc3eda4ec25beb7d6eccb02d34b9ea4 SHA-1: 9869ca1a52db322361c199951825ccba0157dbc6 SHA-256: 26f3eeeafa5f76869d04352e910731dd4128d13c0b32f368c0c2dfeb861a6828
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://cdn-cms.f-static.net/uploads/4380699/normal_5f8b88e5583b5.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4417824/normal_5ffa2d78a7c9e.pdfIn PDF document text
    • https://site-1176684.mozfiles.com/files/1176684/tie_dye_sweaters_diy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5f9940ebe95da.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/google_sheet_spreadsheet_shortcuts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446770/normal_5fda6d55a0c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422148/normal_5fbe005c8a38a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391896/normal_5fdca6f80e965.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365551/normal_5fdda100cff54.pdfIn PDF document text
    • https://gituwere.weebly.com/uploads/1/3/0/7/130740556/104609.pdfIn PDF document text
    • https://traffset.ru/wb?keyword=line%20em%20up%20knock%20em%20down%20lyricsPDF link annotation
    • https://s3.amazonaws.com/pozokimepe/figasufukojutugebexuxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000ca10.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000ca10.bin)
    • 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 extracted file (font_00_sfnt_off0000ca10.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA10 5208 bytes
SHA-256: 5ab4e7b5b57267a6c6166bb342e14f66c711e897d73db213934543e2d4aea547
font_01_sfnt_off0000dbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD1 10048 bytes
SHA-256: 171d83a4fe3da7d3d1b2349cd6730b6d2a8d4bb61164367dfce92697528c1251