Malicious PDF — malware analysis report

Static analysis result for SHA-256 07869abfbe70afb5…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 11:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8bb39f8e73b4c752859d832b4789b4eb SHA-1: de1ed28ff5d7f0719e73568e75711bd6f911644d SHA-256: 07869abfbe70afb57a2c623bdca4e5d8b085d7978882d1ab81222720d1996d2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that form a link farm, pointing to compromised CMS upload storage and disposable hosting. These URLs are likely used to redirect users to phishing sites or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=worst+ending+witcher+3 PDF link annotation
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/b1d89a47bef6f0bf8b7b370d81da50c5/33048732086.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089859eec846---betudawasofaz.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/78722367076.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/xitorukuxanotub.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/000a71147f90cbce0a845661d1afff4b/87846577332.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/36966241856.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/gukamakimugezakib.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/8f34aa8388a6e69aaed247cf760fe1a7/32093748144.pdfIn PDF document text
    • http://velisend.ru/photos/file/jutexif.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/79461e2f5914b6fa5a54d61daf063f27/12060736750.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/jokori.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/6c23358b92f4d144996af6e3bd051eb5/ropoxujobos.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a02d326bea---fovake.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/10875467306.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a09157b6ed3---vopobejamigojofafusa.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c70cf1aeb---64628424367.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/79182805739.pdfIn PDF document text
    • http://rhoptik.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/64670283553.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/73870958850.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/kewelisefinaletesog.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ja2gopvm6naf8af6v32007s314/sizujexe.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077632831216---7221514385.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/e9445cd487f955fc7bb0597326f28880/kotugosutumerigaxatudoko.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_off0000df51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF51 17472 bytes
SHA-256: cb9b07ae713bac80ef85006c692388f99626537096e455da397f7d848ce2c3fc
font_01_sfnt_off00010c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12455 10692 bytes
SHA-256: 6dae1b960b6c240c5924fb707da87a4aeda2e80ad3b092a5f2c64b7bf5ed38fe

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