Malicious PDF — malware analysis report

Static analysis result for SHA-256 4453671b78990d05…

MALICIOUS

PDF

262.9 KB Created: 2022-01-14 05:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: d68e7c054462def74a7a04f0dd5a8712 SHA-1: f653039c642afb975c29f3ea27238a6c64909450 SHA-256: 4453671b78990d05f94c4c84e4d1136e20f47d1168b5265ee312676de74595c5
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a phishing lure, specifically using an SEO redirector to disguise a malicious download. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URLs likely lead to the download of a second-stage payload, characteristic of a downloader or trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8531

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://catamma.ru/uplcv?utm_term=aadukalam+mp4+hd+songs PDF link annotation
    • https://www.puskinas.lt/ckfinder/userfiles/files/xasutosatepogubedeputaxo.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/12777540040.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/vesadotafegifufomifitegu.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/33930414064.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/resofududusopul.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/kukemizejirozopatilafe.pdfIn PDF document text
    • http://onlinevay.com/upload/files/68175050231.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/lubupap.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/gafudulixurolosijijibetun.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ed842a4e9131f6cb0c1006cd16c6b51d/13190924027.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/mugupivowapeb.pdfIn PDF document text
    • https://sin-wa.tw/app/webroot/userfiles/files/23309116647.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/75279339983.pdfIn PDF document text
    • https://dfkcnc.shopper-store.net/file/files/wotosetitezaseg.pdfIn PDF document text
    • http://vasa-project.org/fckupload/file/valixuxalovererukopela.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/89837861273.pdfIn PDF document text
    • http://vhshf.de/File/41009180784.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///rixes.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/tewojugimubuzufe.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/161354fb625374---83948981927.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/xurajijenogojaviz.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/fajigimoxuj.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003ad89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AD89 10668 bytes
SHA-256: 22e00b98fe1b1a14034f6e86e065038cec0c0ca2839091051dd0d7dcfb2c9125
font_01_sfnt_off0003c595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C595 18204 bytes
SHA-256: ba0cbf61686c9107d594516f0d39d897d22c1ca3e5e5a53035f9ea2eb262e484
font_02_sfnt_off0003f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F4FE 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336

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