Malicious PDF — malware analysis report

Static analysis result for SHA-256 55253f409fa17d2a…

MALICIOUS

PDF

70.6 KB Created: 2020-11-21 06:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-19
MD5: 5d94a5ea69c15846ff3aafa04f5e92dc SHA-1: 60f03f1dce4ef9ef2f05798f9c1e411cc0c8649d SHA-256: 55253f409fa17d2a93fc0edf394e02ea1cbd58e215b9ed53cf23da70e2cccb4a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://s3.amazonaws.com/xafaxotaful/polededadefitenimor.pdf In PDF document text
    • https://s3.amazonaws.com/viboxikuz/all_you_can_eat_sushi_near_me_toronto.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/audi_a5_owners_manual_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/74501643613.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/pathfinder_color_spray_undead.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/8626987154.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/81734655928.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/duzobisuzusok.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/63537903809.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/free_english_learning_book_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/lawuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/24924145321.pdfIn PDF document text
    • https://trafffe.ru/wb?keyword=trigonometric%20identities%20proof%20worksheetPDF link annotation
    • https://s3.amazonaws.com/ropuba/psychology_cbse_class_12_textbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000bfc1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000bfc1.bin)
    • https://uploads.strikinglycdn.com/files/87ac9d15-7c1c-4d64-bc20-b30cad20e26d/nuclear_reactor_subnautica.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_off0000bfc1.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000f7e1.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000f7e1.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC1 5432 bytes
SHA-256: 2fca19891cb3dc4cf84c657d5dfed41d372361236e764ddc0853dbb2c1e1eb78
font_01_sfnt_off0000d22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22E 11224 bytes
SHA-256: b9136ea6edd5b1eef286c6f359776c048b7b471e457053511fb09c3e4fa2e0f0
font_02_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 16096 bytes
SHA-256: 786e4db6c2b8a63317ebd2e62e9313324635a3bcc9286cbba0aa59ea406ff707