Malicious PDF — malware analysis report

Static analysis result for SHA-256 191ff66491ed7bfb…

MALICIOUS

PDF

268.4 KB Created: 2022-02-13 16:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: f04b4ebba805d63e7ca4f0f1b2906c08 SHA-1: 8889245159f15df6c5587b2265575c30b5e1a58d SHA-256: 191ff66491ed7bfb7b35b140ed373e81325e9129e691a1a47ff702b8c59789d6
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8179

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.
  • 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.
  • 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://norin.co.za/XSRYdR1H?utm_term=ketchup+or+catsup+yahoo+answers PDF link annotation
    • http://104408017.linker.tw/files/97049930960.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/24981391098.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1fcf0c8dad---27312229201.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/6612935794.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/14478468075.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/69959901194.pdfIn PDF document text
    • https://signalstrengthexcellent.blunavs.lv/cms/file/zezir.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/regajuzo.pdfIn PDF document text
    • http://lam.kiev.ua/kcfinder/upload/files/7742963567.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/30021775031.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161f4e994b631b---67970630517.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16194f0fc277fa---xagolemuxikix.pdfIn PDF document text
    • http://hzqzg.com/d/files/lojomaniziwe.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/zitinituson.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/26116605548.pdfIn PDF document text
    • http://valleytechltd.com/assets/ckeditor/kcfinder/upload/files/90486729937.pdfIn PDF document text
    • https://bem-sa.com/img/file/kenamepojugamosamepo.pdfIn PDF document text
    • http://abnicum.ru/files/file/89394381973.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/3a88989ce7eecd1efeb22832e907c73c/61194440549.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/dc93c1e7f368cd5d4be616b815e68e3e/nejefasusepumo.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/4aa397016362f02bd685f70300136871/10208593718.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/1244450557.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/81680573791.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_off0003c687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C687 17240 bytes
SHA-256: cf368df005ec10fc308c1490b1884ccc1063d6148c9a3d9771720574f4cc011e
font_01_sfnt_off0003f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F387 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00040aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40AA7 10624 bytes
SHA-256: 20911f3ab0f8ee3a0fed247633026e6807b625c56aa38ec41829dcff969630ae