Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd4993ffa9a6c94…

MALICIOUS

PDF

82.2 KB Created: 2021-07-20 16:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5faf0205132383810c791042bd544cd8 SHA-1: ab6b27dd486aa8b42bf17eec964ac596606dcb25 SHA-256: bcd4993ffa9a6c94d5f6c18cae2159e200af92ae80dcb7abcc7160dd73702b89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised websites. These sites likely serve as distribution points for further malicious content or phishing attempts. The presence of multiple links on disposable hosting and compromised CMS uploads indicates a deliberate effort to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://mytaylormadefamilyusa.com/clients/864113/File/66823856847.pdf In PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/72221437946.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/7ddcdd95cd66a5521fe0fa748a222cb8/95297966817.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c32921f51---65807492941.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/71901511448.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/llv0jhjuornbhldf62aoerjra6/15730250878.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160755e20a68d0---dubugekopetariwukirem.pdfIn PDF document text
    • http://iphysiology.ru/upload/kijixaj.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad864aa8cde---vepewafotasikuj.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/d853cf15f4072f4485d3fc84191bd870/88264186568.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/debazekikegelunajegonel.pdfIn PDF document text
    • https://xn--faade-zra.ch/ckfinder/userfiles/files/84443868534.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/lebuwimujobapubukexagire.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca6be4275a---gugiwiwonodax.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a66a822bb4f---83183484495.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/zivimixaso.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/47338402620.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=boxer+lab+dogsPDF link annotation
    • 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_off0000e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02E 10424 bytes
SHA-256: 5cb56334fb9004189053ffdf7357e982a7ba7cde6d2296519b5e0dc986e539ba
font_01_sfnt_off0000f7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD6 17072 bytes
SHA-256: 9b2b290ae92e13815510dbd9bdfffc8fa9468addf2be7e47167e02954c186de2