Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c74e5450052bdd…

MALICIOUS

PDF

81.8 KB Created: 2021-07-19 05:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 03d1a053f510cef9d29ac3992d65d497 SHA-1: da571853fdb646f04668dd23b3e76ef6f3876a31 SHA-256: 02c74e5450052bddf28670e933243f55cb52634dac9e8b6672835a3b1b7411df
126 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2548

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://aartipalette.com/userfiles/file/67380048307.pdf In PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/9ecf7ff7ad53abf65d68c619a8cb88f6/90024758301.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8ffd9a3ad---sugowipiwodilasaruzoj.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/79f66d1d1db6ab1b3ad4e70ae83d6926/78544201998.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fb847d7df---30166737350.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/78964924239.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cc7ec5102---pitexukokode.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/favejokuj.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/53291249698.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/76123244429.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c54879f3d---59155892023.pdfIn PDF document text
    • https://info-jimukyoku.jp/lot/upload/files/10701212533.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/7amvl62b2snbdirv9s7en6d203/dobufota.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d6515b1066a---zazijurogajosofilovozogi.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d85c30881---33760304610.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/vhcq3sks0gsfdaondmm0nrl0b9/wixivin.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/nmn765nu0farc266b6t3h9huf7/59182988251.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/58453836021.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/belodikeb.pdfIn PDF document text
    • https://htchninc.com/d/files/80923601433.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/rabepatojodekemowajikani.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/zusikabexo.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160824609b19c3---mufumizokatebox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=forgot+yahoo+emailPDF link annotation
    • 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_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 10376 bytes
SHA-256: fff584e362d55e4d6627355af1d7cb6b28e4d20f6c8c470d9b8ae8b8c1e8fa2f
font_01_sfnt_off00010082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11894 16740 bytes
SHA-256: bdf3450be23565bdc07221e58b5e41017aa227a0460136f3e915f9c25720cadf