Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e7c30621c33c64…

MALICIOUS

PDF

65.1 KB Created: 2021-10-07 15:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0204c3f45a72da531174bfd3a8b0e05f SHA-1: 12edb8f4b64cba2a8abd8a4d8fad64707a541756 SHA-256: b9e7c30621c33c6489279b7c8bd5f2660ce654e382821598131d0eb832c9129f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable hosting, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7082

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=how+to+replace+black+color+in+photoshop
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/69032807031.pdf
    • https://pleasanton.com/wysiwygfiles/file/fetuxasutiluponumadedame.pdf
    • https://thefencedocumentary.com/adminfiles/file/37884345513.pdf
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/98083596839.pdf
    • https://amatnieks.com/pictures/image/9098559136.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16142c2a531f89---85960580141.pdf
    • https://armature.ir/cache/fck_files/file/73437380659.pdf
    • http://royalwedding.jp/images/blog/file/sowivuji.pdf
    • http://haiannweb.com/uploads/files/pogefiv.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16136938be6a7e---jumokojopijipimakedula.pdf
    • http://www.tecnobor.es/ckfinder/userfiles/files/13713995410.pdf
    • https://chsins.tw/uploads/files/202110071307321868.pdf
    • http://sineadstone.com/userfiles/file/29768806937.pdf
    • http://xn--lv0az70cxar.tw/uploads/files/202109080203257846.pdf
    • http://mutamobilya.com/images_upload/files/6216156254.pdf
    • http://ccsup.co.th/uploads/ckfinder/files/16303107218.pdf
    • http://kfnmsz.com/upfolder/e/files/20210910205031.pdf
    • https://trieurodata.ro/images/file/40800540346.pdf
    • http://pomelieagency.com/userfiles/files/tudoxewirisosenakipiti.pdf
    • https://greenfuturevietnam.com/Upload/files/57094403536.pdf
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/61439866249.pdf
    • http://golden-candies.ru/webroot/files/files/tipenagino.pdf
    • https://laznia-radom.pl/userfiles/file/81028368097.pdf
    • http://mrybalko.ru/files/17618125529.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de50.bin
e5a268d68ddaf88165c97d33c919a4e6a78aeeb1317dc92a986f2047fa375abe
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE50 10780 bytes