Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fadd2609ea2c298…

MALICIOUS

PDF

103.8 KB Created: 2021-06-25 12:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7704b82e97108f4e276458d739852bc1 SHA-1: 5119bc04f453b7291a3f471fe94abb585401f1ae SHA-256: 9fadd2609ea2c298d95f609f745cfe082913ccf8836551a5d99f3da2228e2b5f
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 contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URI heuristics and link farm indicators further supports this. No scripts were extracted, but the overall structure and URL targets indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://ketchas.ru/uplcv?utm_term=short+time+series+forecasting
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16085867b3ddad---44322614771.pdf
    • http://valeneighbors.com/userimages/jegovamimujunazu.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/a65b77e7fdc1d82662a37a77df70456e/nafumedewabulumojerijesit.pdf
    • http://elijasprojekts.lv/files/file/pomasexogepesapuruxapato.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/fag3paorbe0qms1pb3o06i0obo/85422589266.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607960b11877b---44140133979.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/foge1ioksg46nge9oi8bka9cch/43007748584.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ead64926e---rafuxetopudux.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b160f3bcb04---pujizipafarimotiseru.pdf
    • http://fresh-j.info/images/uploadedimages/file/28566509558.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cff5621d6e---depededofumutofavurav.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cf52d6c90---ketatemowadivuzusakivep.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/gimpfjn09rdq6bfb2e9queebdi/vikatoxaxowirilodofifawug.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb32085a78---figoboligif.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a10f42120---1253306030.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1f810da2b---23710591668.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001305b.bin
47d20627b1e6d5066bdbd4e2786cb89ad870e345dee756c86ab3b3b80e67730b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1305B 19020 bytes
font_01_sfnt_off000161ec.bin
44defe29b4811ea3349e11413d7a91a66e9d0165b5e53b0344b4eb0c271faca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161EC 10812 bytes
font_02_sfnt_off00017ab6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17AB6 16792 bytes

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