Malicious PDF — malware analysis report

Static analysis result for SHA-256 195d37757d623746…

MALICIOUS

PDF

80.5 KB Created: 2021-06-28 00:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15e14b9dc746b90f05622b7ff8c1e62b SHA-1: bc2df29eb89fcb5f49a315eab40478d474904981 SHA-256: 195d37757d623746fdd19da5a46b0b93817eb4cbe8e03cda9699cbf1e126f108
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous external links, many of which point to websites hosted on compromised CMS platforms or utilize disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=how+to+say+girl+in+spanish
    • http://safetypath.net/cms_images/kijedemutege.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160909ac9eedae---godegasepag.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/35040107343.pdf
    • http://adbuilder.at/ckfinder/userfiles/files/92512414619.pdf
    • https://vansuloi.com/uploads/userfiles/file/45370844899.pdf
    • https://cargotavio.ru/files/file/15249415924.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a968b197ece---vasaw.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/r7l8np3tblvbaakjlsgul6eeat/nudetalarusizobog.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca562a9521---36094219571.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a76ec83d0a---nenukulagofezagegido.pdf
    • http://www.nomorcantikjoss.com/file/fijilifu.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/edt7ibnql65chnpd2cnu2jb4d9/sikemogaxuduwipo.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/c06e9ca804d3da7b48435d5111344526/pavebisadikofi.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/dbb9b7ac608407696be7e98670a3cda7/80827629900.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c89f49e1930---zaramutati.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/qpjl4bjro7cpovne5ja0dh67j1/73119514546.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36ea3d104f---17179487025.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609044f81d357---63449369235.pdf
    • https://mebelihome.ru/upload_picture/27810117358.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/dbd29a3ecc8c109ebc2891a6d5394259/funiwekezavukajupivozod.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/35d571256a187ea030b904f0680b394b/59127465089.pdf
    • https://eventaipei.com/upload/files/31213720795.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7434d6f88---kanivijumulirol.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085d756ad916---zelexetawimoduwanotoruvu.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_off0000d52e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD52E 16792 bytes
font_01_sfnt_off0000ed40.bin
ec67ee7d4110179956abff6030ea60df458b595975fefad5554504e66326566b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED40 18452 bytes
font_02_sfnt_off00011c86.bin
3adcfbc6682b7f4f6c0d42ea68ce0733081447a52722c84013b718129427630c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C86 10592 bytes

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