Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f53a3d7118b330…

MALICIOUS

PDF

62.9 KB Created: 2021-11-24 13:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-02
MD5: 8b61fb70748c55c547115d586e139072 SHA-1: 703feb5d6438eb8bebba5e3c6d1cb211f7f5006b SHA-256: a4f53a3d7118b33023c4b8dda8c2136b4a8ba29ce1eacf6c2abdde5d5cf7bfcf
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://trust-law-firm.com/userfiles/file/20211003182855_654965738.pdf In PDF document text
    • https://pre-www.bridge-academy.com/uploaded/ckeditor/files/56765639820.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xixozevivulonil.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/xajejisozabizukebot.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/67791115907.pdfIn PDF document text
    • http://vlajamo.cz/images/file/nijinefegetoza.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/10482641679.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/97521088028.pdfIn PDF document text
    • https://digiconelectronics.com/media/60816045981.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/rakodakuxujizim.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/96659134164.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BcFPVxLj4jw/uplcv?utm_term=happy+birthday+to+bhaiPDF link annotation
    • 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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000910d.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000910d.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000910d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x910D 10284 bytes
SHA-256: fd46992a1a5990cf01c677060fb39bcf8aa58f7cfc2b29be417df983a5d95b5b
font_01_sfnt_off0000a80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA80D 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0000beac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAC 18840 bytes
SHA-256: 83a76d0abf271526920195f4c9d8d12d506b24616dc3df91e6a5fb8f7b6c64c6