Malicious PDF — malware analysis report

Static analysis result for SHA-256 4257fdbcc29081c0…

MALICIOUS

PDF

173.5 KB Created: 2021-12-05 11:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 702dd3ff48178cd6d812b3657c6bfdc9 SHA-1: 3f27e65851d0cc45ae14244006389ae09d9ed060 SHA-256: 4257fdbcc29081c093d5512f9a650178ac9c94e31a5b7d0bc996c0ac0874abd6
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9629

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=past+tense+worksheet+grade+2+pdf PDF link annotation
    • https://kalitelivideoizle.com/resimler/files/fepujawuligi.pdfIn PDF document text
    • https://stvorki.ru/files/file/sidixoxevuwewemifexatopa.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/98191308984.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/18873822624.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/8ebe1dbb6bc1f58f20ab3c95e1f42a1e/jegamitegoxenofavewun.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16190e55dde258---muginuwo.pdfIn PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/43969497490.pdfIn PDF document text
    • http://allier-genealogie.org/File:/wadawurawojug.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/sutojojakanufafejiredeg.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210913_075410.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/80402070293.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/96268768331.pdfIn PDF document text
    • http://alituncer.net/userfiles/file/43842078769.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/78164273296.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/puzuvolixisabujan.pdfIn PDF document text
    • http://centre.annuaire-regional.com/ckfinder/userfiles/files/99397977053.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021110210280973499.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/zadidedipimuwotis.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/68944252034.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/batukobepemoju.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/xogufedumusasa.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_off0002482a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2482A 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off00025ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25ECE 10940 bytes
SHA-256: b0faf52834bc7ec1f2d2ef1676760ef1c86b56f4fd834656798f2644e8bc0906
font_02_sfnt_off00027811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27811 18472 bytes
SHA-256: 07693019068032861de3d92bb812892924f496036411c3113618a042c9dd9c2a

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