Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df0ee46c3dc4a33…

MALICIOUS

PDF

80.5 KB Created: 2021-09-05 13:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 330a1352c4f48fb0988bc72a72ab40a3 SHA-1: 016491767127047c0da6ac9c6a2e443f5449d173 SHA-256: 2df0ee46c3dc4a3309b80b3da450bc9f02cba7853f6ba0e4cb6c69c6bb6d1528
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=2017+subaru+outback+3.6r+manual PDF link annotation
    • http://sjhtractor.com/d/files/38044591326.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/k3sol1otcb9lf3ivhsu519uon6/rodesolusipibituno.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/10150212930.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/18bf41a49bdaec94f91eb9248c2a08a5/fawutirogati.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/88105379924.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210815070021.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/wenigaxupepavefawotowup.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/rufafukin.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/39377394458.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/37367862124.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7f6e2b9b78bca49944f7aaba345b2ddc/37686989372.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/fc96445a4914f975d12342ba312f0a0e/74860700619.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/918a91760e3d7bde9ba7120c8a46e7c5/vinexugalus.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/dezuzinakafodimimaken.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/2a6acb7c54e9539b3b90af1921bf69d9/kezatanibodejumipa.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/nurirowameke.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///89749926618.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070b14b16543---sesevubud.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/40431895267.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/92398495728.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/99764933491.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a978654a629---4274359569.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_off0000d5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A8 11152 bytes
SHA-256: bb7115f0c88b8fd50892988720e9aaf85fc16ace6057b97ccf898437910cc176
font_01_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 17108 bytes
SHA-256: b82046a4dbdc2558a4e57dd44d24875a1257ab11e185804372dace9bf3a4fa77
font_02_sfnt_off00011c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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