Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc60fb7c79a355c…

MALICIOUS

PDF

85.6 KB Created: 2021-07-04 16:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2db7532647e7d31d94fcbab3606595dc SHA-1: d0494f8ca2889d7e401665e7e787c1d6b6dd38d4 SHA-256: 2bc60fb7c79a355c2307f57461e1c987234ea59eab3458d9f13f20328696b19b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a deliberate attempt to obscure the final destination and potentially distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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=design+and+construction+of+nuclear+power+plants+pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/eb798aa29af380215b246b8d7cc0cf16/57851290054.pdf
    • http://chromoink.com/updates/file/sinure.pdf
    • http://www.anjhimayath.com/upload/file/wakinonawabixitotifi.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/1a9ba167f57f036ce98c14f29fe65231/desavotagep.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d815adda5d---84778323106.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd8016cb2f---23301213384.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a87ef11e61---98083236663.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/09fa0d789e8622b5db9f408d44ab6311/46198321150.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7111524ae---rupekamelupa.pdf
    • https://arabacioyunlar.com/calisma2/files/uploads/nomadiva.pdf
    • http://elitaliaweb.it/upload/file/61464320566.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e5269f0ab---47652434294.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/q4nckcs8k50ndhsp3usrbgam91/64204628398.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905aaccb4e0---86127121032.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f481d77695---28747794811.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/a0b9d172e2e7fdf99a58783655064163/lezepovubumisedajiwuwo.pdf
    • http://interwork.sk/userfiles/file/bututeresazosute.pdf
    • https://topupdana.com/contents//files/52800196297.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/8mk8egnc434h6p44pjimbp72n0/66082253152.pdf
    • https://creteotels.gr/FCKeditor/userimages/file/kedepagipixatesezi.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/u0eko6ntbdpjo6cj6i73luhqbn/fugapegi.pdf
    • http://bloomx.com/sites/all/sites/bloomx.com/files/11508870698.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_off0000e9d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D7 16792 bytes
font_01_sfnt_off000101ee.bin
5918472a1abfe8870558fafea21e95a2fb3fcd4d825562b4a90b32191f945be8
pdf-font-stream PDF embedded font (sfnt) at offset 0x101EE 10980 bytes
font_02_sfnt_off00011b6f.bin
b9bb496d2504b5def687de6e727470d670f2d1f4db83b1f23f2840f9315a6abc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6F 17336 bytes