Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f4fb189ca2e515…

MALICIOUS

PDF

67.5 KB Created: 2020-12-14 23:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-19
MD5: 8f4ffe237807594978c01efc81decb36 SHA-1: 8bfead3330b5d1ad3f5df4264d3082bd918d5895 SHA-256: 26f4fb189ca2e515d2ed2b290361f5bebec697fdf81ab504c8bee2daabce9a18
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://traffnew.ru/123?utm_term=crested+gecko+food+consistency PDF link annotation
    • https://s3.amazonaws.com/retisovojor/kijepexojitufinurivoxilez.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/icd_10_coding_guidelines_south_africa.pdfIn PDF document text
    • https://wejerimaz.weebly.com/uploads/1/3/4/6/134648800/6965957.pdfIn PDF document text
    • https://fogakorix.weebly.com/uploads/1/3/3/9/133997140/1534332.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/converging_lens_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/pifal.pdfIn PDF document text
    • https://judezirebesos.weebly.com/uploads/1/3/4/6/134669344/6b94ca31f8e6cc4.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/74989763358.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/45_hours_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000cbbc.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000cbbc.bin)
    • https://uploads.strikinglycdn.com/files/dfba617b-eb10-409a-ab89-d7d1e10e87d9/vikuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea6b0ec-1a75-4bc6-81a0-85820edf83f3/faxofe.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 extracted file (font_00_sfnt_off0000cbbc.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBC 5016 bytes
SHA-256: e27cf85bc7777a9b560c8694aecece3240abca2ca218a312c8e484b984bbff1e
font_01_sfnt_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 10632 bytes
SHA-256: fc05a74fe3f117b01a7f6b5a614b8bdd871516d0b6639df5fb55dde053f03759