Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8777cc6cd0f7dc6…

MALICIOUS

PDF

677.4 KB Created: 2022-02-03 10:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 61f7d66faf5e0ffcc982badd497a237d SHA-1: ffa39bf707b1dc51ac9db03401c32784e927d15d SHA-256: f8777cc6cd0f7dc65ab5ead6a75b82aac163061247c274e9d2d9a7697e3233dd
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3636

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://wirut.co.za/XSRYdR1H?utm_term=critical+analysis+paper+format PDF link annotation
    • https://indikino.com/ckfinder/userfiles/files/81711104834.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/7073ffef7a2b1625c5097362dba1c526/75302252710.pdfIn PDF document text
    • http://www.salda.se/saldus/kcfinder/upload/files/wezokomisorifiroliwimaj.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-8-14/20210814011123564442.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/23423939742.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/pawekebixemutorurof.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/vodabisow.pdfIn PDF document text
    • http://goldmustang.ru/files/files/47876031761.pdfIn PDF document text
    • https://laure-guermonprez.fr/userfiles/file/boludatu.pdfIn PDF document text
    • http://sd-bada.yupucx.com/upFile/file///ITX202111091056526678.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20211029_812262295F8D1C7F.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/35948045506.pdfIn PDF document text
    • https://cancelaria.pl/galeria/file/66187649932.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/memupexegiwuwutenomugor.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/161cc6f259cfe5---95163177782.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/dadudokejiwasupovikolem.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/79067176916.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/16041738018.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/3406650685.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20211206_024351.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161aa499742360---simitopilotetefi.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_off000a2b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B62 16608 bytes
SHA-256: e97463172c1e4bb14427da9c683d704406f7b4c6a3653bb6b6765af7b9d2c9be
font_01_sfnt_off000a5671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5671 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off000a6d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D91 10784 bytes
SHA-256: f155cbb805aab27c440d128a8193417cc00aa51c472edba2aa2fe07f79917354