Malicious PDF — malware analysis report

Static analysis result for SHA-256 4defda845b277635…

MALICIOUS

PDF

187.1 KB Created: 2022-03-25 18:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-29
MD5: ec814336fa706ddb487ef024a7a8f6c1 SHA-1: bf55e44ab27ee2b7ef11d1b7f36b8b65208bf864 SHA-256: 4defda845b277635d6becfae0478180517aa04abd8caf3f5ba8988ff803b68d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document body and extracted URLs reveal a link farm structure pointing to numerous disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the link farm indicate an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7553

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
  • 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.
  • 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://ragaz.co.za/XSRYdR1H?utm_term=pokemon+harvestcraft+marriage PDF link annotation
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/90604451035.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/42318210631.pdfIn PDF document text
    • http://purel-biopharm.com/upload/files/81068915117.pdfIn PDF document text
    • http://taxinspire.pl/www/js/kcfinder/upload/files/64681031934.pdfIn PDF document text
    • http://isiknakliyatmasko.com/img/editor/image/file/gufefufawunimu.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/wumigubufisewodovina.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/24490152775.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/22722778308.pdfIn PDF document text
    • https://giaiphapthietke.vn/media/file/files/38548816370.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/berobaxokuzef.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/71441065135.pdfIn PDF document text
    • http://www.colfacor.org.ar/administrador_web/kcfinder/upload/files/56052360765.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/24679025385.pdfIn PDF document text
    • http://formasrl.com/admin/kcfinder/upload/files/80079652295.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/novudemejerebobadagari.pdfIn PDF document text
    • https://alertsecurity.in/ckfinder/userfiles/files/45726058817.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f996129e76f---vijasox.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/fuvele.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/vixisazoxenajomi.pdfIn PDF document text
    • http://favourtec.com/attachment/file/nejewoleruwovakimowezatef.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/mavife.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/wemom.pdfIn PDF document text
    • http://syekp.gr/sites/default/files/file/xobexujapulilo.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/famegodurijuzoxemudujevoj.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/puzekigowipexas.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/65300660585.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/zapivofadibudumidudage.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/13314473435.pdfIn PDF document text
    • http://partynfun.com/kcfinder/upload/files/65728326933.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/10515721117.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20220202042811.pdfIn PDF document text
    • http://houtackers.nl/userfiles/file/mirosiwojavigisoxote.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/76299418468.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/84066545029.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_off00026769.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00026769.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26769 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00027e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27E84 19692 bytes
SHA-256: 1f6e775f4ecb5c8db92b10ae782fe6d63a8241967eae68e851a8140939f9ac5c
font_02_sfnt_off0002b29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B29D 10896 bytes
SHA-256: 24a8e8ca788e3e4494f81529e332fc2b327398231125c86aed2e796d9469683a
font_03_sfnt_off0002cbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBB2 4924 bytes
SHA-256: f36d030e6a87520d731433fc61f61d12af236a6c0c9228452fa91edd265b783f