Malicious PDF — malware analysis report

Static analysis result for SHA-256 25168492375cfe0b…

MALICIOUS

PDF

74.3 KB Created: 2021-06-12 10:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1fd9156e58be4de2b9f85ae8058825de SHA-1: c6842f892a0d8ec07035bcc34344695da3b4e94b SHA-256: 25168492375cfe0b8fb3c397b177e8967dc8211f24021276f2c067aaf7478f25
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to 'sociology upsc books pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9774

Heuristics 5

  • 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
  • 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://pistant.ru/uplcv?utm_term=sociology+upsc+books+pdf PDF link annotation
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e01b42269ad3d91759e6c406db3423df/20338946249.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c1216121d---61666105666.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16087dba40747d---76843774280.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/wijiw.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/61da6a93fa81b53f914ee117a2d80e3c/mekegafebuv.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/guwasuroloketevor.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/ea7a762c8e49084ad8424035c4ebdbd2/bufurilididezepubafizurid.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/0e5af5c4feb9af1089b336b32c604c74/10946133036.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/uob0ckjf2j2j9it4hej5mtbd3l/35963871452.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/1f547d3ccfc8e96aee6a452a84e3f08d/vufexoxawatujonem.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/veon7jk5kap16ujpuer521gsr3/tozopatijuvulaz.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/lisedukojatapabax.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/burapolaze.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/noxefebasevez.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/48d044da1ae040e9b647f179b3d8e2d2/73102073756.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9060a0fb4---semaxivevexanudumuvadub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C19 5428 bytes
SHA-256: f01f2c651050167a9e3f901c2d66fd194cac82168480645f22c412bb118ce44b

Open this report in the interactive analyzer, or submit your own file for analysis.