Malicious PDF — malware analysis report

Static analysis result for SHA-256 867d1b25941b469d…

MALICIOUS

PDF

81.8 KB Created: 2021-09-02 01:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 254a6c4fab27ec24a64ec9881380af8b SHA-1: b4672fb8f6cf43f72d2144c989e38b48da90dad8 SHA-256: 867d1b25941b469d826514f0aeada990c3cbcebd7d0eaeebe61e60de172692eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing pages. The presence of embedded JavaScript, though not directly executed in this static analysis, is a common vector for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7913

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/i55bb63bmug1kkfo6p3218qsn8/15523838544.pdf In PDF document text
    • http://canadanur.com/resimler/files/weled.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/luaga2s7q8e29vktcrbjqoetdu/gazakuxaxamawa.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/setajowijikekidominolure.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/69637743748.pdfIn PDF document text
    • http://bryanhigh78.com/clients/72554/File/saxip.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/dewexun.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/xizaduvi.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612029b837a87---29588271499.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/45251199458.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/kr76lukdf4ei51vslmussldu9f/29680365639.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/ketufeson.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/4bv8pdrahl3itglcsp40v0jl44/tokegulerokoguvobevajod.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f256d69e8d8fb7535bf2922a46f3cd24/11666228358.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16079002b5f123---62162834318.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/41323251400.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/80952617502.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/66679412799.pdfIn PDF document text
    • https://isosklo.cz/uploads/80101342195.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/62c34bb6caeb88b81267689ee59b823f/dusatajamopulevad.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/fifelakitorarikumukimijot.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/napaw.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/wigovabiwisonidufowu.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16073d1cdc3380---32381903009.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6de3422f58---jusoroputukojavusitopi.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/fugimosutenivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=minute+maid+park+mapPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 10404 bytes
SHA-256: 682040042814835b0c1abb6efb2227bb36d452efcd211d92ae5fa2a8f026db9c
font_01_sfnt_off0000f8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 20756 bytes
SHA-256: c541771a204c71713e7e1b5bc8f911e296aee100c2fd78a8b3a9d095253c415c
font_02_sfnt_off00012f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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