Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af4aa40b6c5d5c7…

MALICIOUS

PDF

358.3 KB Created: 2022-02-11 23:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 02f3d264d48403021486aa613cef961c SHA-1: 09b297c468090fa8155397359598da4cf7e65ec0 SHA-256: 4af4aa40b6c5d5c78a85bcfc752533abe820aa0d7078e1535a6a404686920593
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8625

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://mifuj.co.za/XSRYdR1H?utm_term=alessandra+amoroso+la+stessa PDF link annotation
    • http://montazerangroup.com/uploader/file/39932143733.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/71603180686.pdfIn PDF document text
    • http://0851gay.org/userfiles/202112file/2021123103005470554.pdfIn PDF document text
    • http://djapm.com/userfiles/file/1201138721.pdfIn PDF document text
    • http://ba089457.coco1490.com/upload/file_folder/file/papofude.pdfIn PDF document text
    • http://balony.dmuchance.eu/userfiles/file/52176539737.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16182c093b7fee---85486569985.pdfIn PDF document text
    • http://i-mag-ine.com/media/files/kawezepetab.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/4a96ae745024d80c54039febd4120861/98420426778.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/33060688757.pdfIn PDF document text
    • http://hopkinshigh1966.com/clients/1/10/1054c114374c88b4a165e91103565d41/File/42611242931.pdfIn PDF document text
    • http://azv-goldeneaue-uthleben.de/kcfinder/upload/files/jujalatumekabewebamasi.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/20935134861.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/14098038466.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/befemufutoxomav.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/17073549250.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2022113051155534.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/slg1m9pttvojk0b7p2ucacvdo6/luzolurimerepeg.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/23029806635.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_off0005299b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5299B 19424 bytes
SHA-256: 75b3454a29697698ce6b3d1f79cab58332887fd2fa132ae3beb655eccefed705
font_01_sfnt_off00055ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55AD3 10296 bytes
SHA-256: 369df6195cd9a81bdc754ba566785b9d13ac38d4a44e577ffc75fafb6cb39e32
font_02_sfnt_off0005720c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5720C 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9

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