Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f944bbbc695da7…

MALICIOUS

PDF

537.3 KB Created: 2022-02-19 23:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 4296050deb664bb6a548002a76433b10 SHA-1: da9e9dfa30b517e9905716866c84f51c2c25a90d SHA-256: a4f944bbbc695da7596a0ef99d0f20bd7bc7f9a2a824c9dd36d6c6e0bec52aec
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4180

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://mifuj.co.za/XSRYdR1H?utm_term=bteb+admission+circular+2019+pdf PDF link annotation
    • http://wisewood50th.com/clients/3/35/35ca2b70ae131fa39667c240906a3fe4/File/25130034309.pdfIn PDF document text
    • https://urudolfa.sk/upload/files/38050943382.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tavevesagebebirakaxazo.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/00f16375fa16fce93df693f4fdab24a2/xipivawelisonugogagifola.pdfIn PDF document text
    • http://prompol.com/media/file/gamaxaxugokoxo.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/48687278950.pdfIn PDF document text
    • http://propack-th.com/image/upload/File/20317684134.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/34097174659.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/41018440294.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/65079851748.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/161e3943e9543c---rujoledexi.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/94717761827.pdfIn PDF document text
    • http://sergeybazarov.ru/file/40429299116.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/gurorozimowepokofimifo.pdfIn PDF document text
    • http://pellevah.com/upload/files/25250432259.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/73500040813.pdfIn PDF document text
    • https://baschin-heizung.de/meineBilderAlbertGrundschule/file/jutokugekuzam.pdfIn PDF document text
    • https://questyme.com/userfiles/file/93981690673.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/161a06a5e2f247---moxuxiwulunilaxesabibat.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/lixosorewen.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/23c9fbbd03162e2251e7622b77887e93/79323087140.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/zagodakop.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/64066320329.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/81572174420.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161e4b7a35c00c---6050119746.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 extracted file (font_00_sfnt_off0007df0b.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0007df0b.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0007df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF0B 17360 bytes
SHA-256: 14c8ff177652c1d36342e9491f298b90465544e5fa4a15bf826ca91c72c6ff32
font_01_sfnt_off00080c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C31 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0008234b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8234B 16336 bytes
SHA-256: adf38969d40f501586e0caf93d33991e243baeeecfe575c4831cdbf64b7044fa
font_03_sfnt_off0008394e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8394E 11536 bytes
SHA-256: 659f48c0488a538d281b7467806e0e2f63db3905053e6fd22cfa1719455148cd