Malicious PDF — malware analysis report

Static analysis result for SHA-256 65fa3915107c81b9…

MALICIOUS

PDF

74.9 KB Created: 2021-08-20 13:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 04f31a50cd5e631ca0c4e98fc8af6ac1 SHA-1: 2d26dc2c34decf0ff89a2b73fe30f0ef5829720e SHA-256: 65fa3915107c81b9f3156b97e965a0b72101949e7c5104c266b437c102f4d34a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=mehmet+okuyan+kuran+meali+pdf+indir PDF link annotation
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/0a0dad4c19119f4a73d8ad730a6c68e4/81833188919.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/jiwasidekekidip.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/66939791850.pdfIn PDF document text
    • http://alkanboya.com/files/file///88054736406.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/prlfilb9gt7duobq25rj0bbp01/97420175087.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/tepabanazedawibizuliza.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9735fb70cd---80382842933.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/gfsjjobpd518blrdcm37tt0j24/32114205484.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/telexuxijekavidemugebex.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/83607980011.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609085d033b08---gegaturilo.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/mafudifeme.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/97087397139.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1611f204a4f51d---13367016683.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/5139518491.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/fadofiragibexoraxozej.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853c7eb82b8---88027136424.pdfIn PDF document text
    • http://irollee.com/userfiles/file/rituvutivipevenegagulise.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081de8ac0bbf---93626193701.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///jomenulomizigora.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/2c72b52f861bfa5a72815b83c190b723/gutelabogo.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16088273a8f7bd---duxojibokeg.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/duzagozemejinab.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/87102021878.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_off0000c471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC471 10892 bytes
SHA-256: 82b9fa62873b8e27c221e7deeaffa345a1fd51d4d2ddcff5d069fb5ab1ef1c17
font_01_sfnt_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 16380 bytes
SHA-256: c969758fe67917ca238271a7094cc93fa66f62260672dbe235c54c0143e3987b
font_02_sfnt_off000105bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1