Malicious PDF — malware analysis report

Static analysis result for SHA-256 8479b0b72f75c890…

MALICIOUS

PDF

557.6 KB Created: 2022-03-24 06:13:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-05
MD5: 32a918fe0bfdfad8b24987f68c3f5cfc SHA-1: 0ad4124702710034d819accaa486a99488b70723 SHA-256: 8479b0b72f75c89007a094286ee440a2d4a555973dc9749cc6f46d9df7c8bf03
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a document body that attempts to lure the user with a 'US navy officer hat' theme, strongly suggesting a phishing or malware distribution attempt. The presence of numerous redirector URLs indicates a multi-stage attack designed to obscure the final malicious destination. The ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3293

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://sunuf.co.za/XSRYdR1H?utm_term=us+navy+officer+hat PDF link annotation
    • http://kraski-chernila.ru/resources/file/98879628637.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/butafoletogugigudapixu.pdfIn PDF document text
    • http://potya.com/vadakofuzuf.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/zubogufuzupodavetuka.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/66902874354.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/sotudum.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/17116075211.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///19969591319.pdfIn PDF document text
    • http://iks.premoweb2.at/userfiles/file/95946548018.pdfIn PDF document text
    • https://www.escolamacrobiotica.pt/backoffice/assets/js/kcfinder/upload/files/40377991857.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/98468502569.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/8809344845.pdfIn PDF document text
    • http://phuctuong.vn/images/files/vuvafometabuvadizezupel.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/zebot.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/gubore.pdfIn PDF document text
    • http://leeclinic.kr/userData/board/file/96577125978.pdfIn PDF document text
    • http://kiajihlava.cz/UserFiles/File/ximawisaxapiwevidon.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/98247997299.pdfIn PDF document text
    • https://generace89.cz/kcfinder/upload/files/64023897811.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/sf0b2go22ul8foevfjd5g6gk9t/3758757589.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/63786636645.pdfIn PDF document text
    • https://arenerachicamocha.sinecsas.com/ckfinder/userfiles/files/35824228306.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/fiwawukelujatugap.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16234e28176344---85788541019.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_off00084280.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00084280.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00084280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84280 10576 bytes
SHA-256: eea4b8a9a79ea094dbcb6129db52ab5639ed85685001959e785163bf3e9695b4
font_01_sfnt_off00085aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AAA 20592 bytes
SHA-256: af84ee54960e3cab2c70d0c760a9bf29826231521b30e7573529263038d841bd
font_02_sfnt_off0008908c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8908C 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9