Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15fa8058f8213ce…

MALICIOUS

PDF

69.3 KB Created: 2021-10-01 00:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ebe4e4d1dbe62a89214095093f3c9723 SHA-1: 525b41e955fd033cf02120578a2908f371e5e05c SHA-256: d15fa8058f8213ce62a80dd9060f2938629ca9262f9e8fe5b7fbb084a901a498
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these linked resources. The file's structure and URL patterns suggest it's designed to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://medvor.ru/uplcv?utm_term=fake+cvv+number PDF link annotation
    • http://citysoupsbellevue.com/uploads/files/vanisalofobasow.pdfIn PDF document text
    • https://ikomsolutions.com/admin/userfiles/file/jajudokutatip.pdfIn PDF document text
    • http://taxfreepoint.com/file/64628870059.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c838466f29---sifanuwux.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/11809448055.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/pepagibilim.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/gezikojebinakuwuz.pdfIn PDF document text
    • https://stpm-sa.com/userfiles/file/zuvunetidumuro.pdfIn PDF document text
    • http://parfumland.sk/upl/kaxixijaw.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/161362485b4019---neludadaboxenuzow.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613509d50a474---46733431541.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/jusij.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/kalawegowuduwipup.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/31125319532.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/tigetisiruwujoxafisemi.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/40069441343.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/dobotenoxexis.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/26192645566.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/sirabezevipu.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161391507df5dd---mowojavute.pdfIn PDF document text
    • http://spec-so.ru/sites/default/files/file/56950803811.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/lesekuw.pdfIn PDF document text
    • https://sjaindonesia.com/sitefiles/file/xivilekop.pdfIn PDF document text
    • https://ksboutlet.com/file/files/63636069274.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_off0000b233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB233 14680 bytes
SHA-256: 6162e16ba0decc91c1afea5108761225276b82030bc8a827d6c1e8d92819955f
font_01_sfnt_off0000d72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72A 10240 bytes
SHA-256: e8ae4fcf83cc698eb3298950e676a07cef036a7cb61810cb32573cf931b20f93
font_02_sfnt_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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