Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afcc15313a9873d…

MALICIOUS

PDF

68.9 KB Created: 2021-09-28 02:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 4381e2e4114726c15e5ea6e49d1c6a52 SHA-1: c147a11ed722f8910dcf4801540e29d96d7508b6 SHA-256: 4afcc15313a9873dd385d8dd5f60157a3b8b15ac09c8ecb0363c428c35863b2c
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://vladekoservis.ru/files/70239897452.pdf In PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/linesilotudelowusux.pdfIn PDF document text
    • http://zuszdounky.cz/files/tovutelesejinikib.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/3514685660.pdfIn PDF document text
    • https://indiansecuritisation.com/ckfinder/userfiles/files/wujedafetu.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614994013d895---nelexojojiwukixe.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/tarinefu.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/2385220743.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/wefekaxolosutowe.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/popafemamizuzes.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/17099143408.pdfIn PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/sisogus.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/14722366411.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/xidog.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/84630108448.pdfIn PDF document text
    • http://atya.eu/files/file/93015083636.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/61893364630.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/b79a3273e31ad9312548355938b262e2/80544357901.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/77078822235.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/83635679505.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/33252951895.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1614d25355d7c7---wumimuduzebepurakojapobe.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4dd91246d---tubapuniluwinifozufutes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=do+i+have+to+use+chrome+on+my+android+phonePDF 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 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_off0000af48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF48 15016 bytes
SHA-256: 62243dc213557b05a40aba87dd6399791c8f653010117f0c8b31de65576b809e
font_01_sfnt_off0000d476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD476 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 11012 bytes
SHA-256: 9f3658c824f92eb1882052cd458f6540fa42dc94f7248b0ab474a350365f3927