Malicious PDF — malware analysis report

Static analysis result for SHA-256 4450467d1c14f38e…

MALICIOUS

PDF

241.8 KB Created: 2022-01-06 02:56:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 279cad7ce9af65c2daeacaa5bb2aff24 SHA-1: da213e6c73300ffc3849de514f92525ee52a2fb3 SHA-256: 4450467d1c14f38ef4a38791fb639f0bdc9dae65b950b64917311ac873822e35
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a phishing lure, specifically using a link farm and SEO redirector to lead users to a compromised WordPress upload URL. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8564

Heuristics 6

  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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 https://crewmak.ru/uplcv?utm_term=block+mobile+number+android+app PDF link annotation
    • http://driver-jazda.pl/upload/file/47513537519.pdfIn PDF document text
    • http://jpiano.net/userData/ebizro_board/file/51008220460.pdfIn PDF document text
    • http://vaynhe.com/upload/files/81893220646.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/16291056547.pdfIn PDF document text
    • http://101balkon.ru/upload/files/tujanezerijigafenufeg.pdfIn PDF document text
    • https://vantainoidia.vn/ci/userfiles/files/xapaxitime.pdfIn PDF document text
    • https://muziekweekend.pesse.com/bestanden/files/dolomizakiwunono.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/161c454dd46c7f---zetawe.pdfIn PDF document text
    • https://suthuytinh.com/app/webroot/uploads/files/39881312825.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/napezaxemanar.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/lameretajovezumalufafibal.pdfIn PDF document text
    • http://c2r.su/uploadfiles/file/2021090314570773499.pdfIn PDF document text
    • http://asvpp.fr/pdf/tevoterasagir.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/1628620840.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/xakere.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/gonot.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16151e836b6ac8---kubidodovuwagizodezazer.pdfIn PDF document text
    • http://reopen911.info/media/file/timewezuwidilaginigo.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/guduweritazuraxamewijog.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159c7ba0adbe---siguvilokejat.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/siwipavimexebefusat.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/53476924868.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132646550f79---75657045360.pdfIn PDF document text
    • http://belstroyiz.ru/img/file/74906463635.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_off00035ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35ADA 17708 bytes
SHA-256: 6f81d5b7ac8cd83c98afdb8fd1b69577d1e10934a9d03f556f9d4ac9739be1ba
font_01_sfnt_off0003893d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3893D 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00039fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39FE1 10792 bytes
SHA-256: f9f215d63eddcdbd008aa1d7066239cadc587f12e4559abc1240cd556484f949