Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb81549347f7eede…

MALICIOUS

PDF

312.5 KB Created: 2021-12-21 11:11:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: f366d7bd5196d217be1d119cddce31e1 SHA-1: a2e20c4a2f3665b96252eb07399670cfd86c9453 SHA-256: cb81549347f7eededff13dcbc0b4bae5b3dd5b27eedf6ececc934a320811b4a9
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7548

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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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 http://cecev.com/stockages/files/gujoxizopima.pdf In PDF document text
    • https://campermagazine.tv/public/file/28959902910.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/memoruwuraxolu.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/75010629800.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/womokezutinagujovigovofi.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/fagukefowosima.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/54661978457.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/wukalozamelo.pdfIn PDF document text
    • http://dejede.com/userfiles/file/76567323753.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/lodotudiwivopekati.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615ba40139506---puwugolorawenoguvokajakom.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/3046911559.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/vulajetaloxorekebuxit.pdfIn PDF document text
    • http://chs.yuanjen.com/ckfinder/userfiles/files/4407607755.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/zetisana.pdfIn PDF document text
    • http://aprt1day.ru/file/8359907073.pdfIn PDF document text
    • http://telektrans.hu/editor_up/36639437572.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/bipexunazukakuxiriz.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/94552244131.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/lazefonifofixura.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/67831910605.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/serom.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/83865588453.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/2I9n2o-U8HI/uplcv?utm_term=update+query+android+sqlitePDF link annotation
    • 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_off0004729d.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004729d.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004729d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4729D 18876 bytes
SHA-256: cacf5e098e5936df301a9a2854aae48f1872ee3caa5754b61adf85eea564528e
font_01_sfnt_off0004a3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3CA 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0004ba6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA6E 10752 bytes
SHA-256: c6b11f443f3decadc02d21a7c1b7d9dd043c839447917708410d2a06977315fe