Malicious PDF — malware analysis report

Static analysis result for SHA-256 f877372b81d700c0…

MALICIOUS

PDF

687.7 KB Created: 2022-01-10 05:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-17
MD5: cbdab50d8c777866dcb3f8bcbb0eb919 SHA-1: 219011ca6e4d2e88015373707290ae02cd42b137 SHA-256: f877372b81d700c0e7539afae3108ce043e7b7aeecaa35ea21d61a648e02bb10
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3159

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 http://0975811252cool.linker.tw/files/nijowuzogalusaxajabupodu.pdf In PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/58088758451.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/tijotez.pdfIn PDF document text
    • https://www.fondazionepolis.it/blog/ckeditor_fullcolor/kcfinder/upload/files/63134352769.pdfIn PDF document text
    • http://chestheart.org/journal/assets/ckeditor/kcfinder/upload/files/kifasato.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/38625467285.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161b323bb6e58f---jikaxutofazosire.pdfIn PDF document text
    • http://senvietsystem.com/ckeditor/upload/files/jabamaxerijewep.pdfIn PDF document text
    • http://yuhuimachinery.com/d/files/73256287672.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/576bdb3e78f20cbe6d0b7550e1a07f63/75610735622.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/baponigeb.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/161d6262f1ea59---vofarelitez.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/robejegefa.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/vewutibolu.pdfIn PDF document text
    • https://myleague.vn/uploadfiles/kcfinder/files/50148636511.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/83696368230.pdfIn PDF document text
    • https://desco.scp.hr/files/37695800907.pdfIn PDF document text
    • http://accronline.com/userfiles/file/32611573151.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/45322624890.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/16478743818.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/wixedenerulero.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/41182991335.pdfIn PDF document text
    • https://rjpexport.com/files/kofosafak.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/78588563458.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/vItLtdF7Pec/uplcv?utm_term=camouflage+wallpapers+for+androidPDF 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_off000a56a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA56A6 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off000a6d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D4A 10960 bytes
SHA-256: c7acec61e9e006b8e37a5559973ef9c5bfaeb47c8d060b99a9dc23dd6074129d
font_02_sfnt_off000a8681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8681 15708 bytes
SHA-256: d7d7899c13bfebc23a289043641a2ea394e81573c7ec82a684f9be53c653d1a8