Malicious PDF — malware analysis report

Static analysis result for SHA-256 562ed6bd4e7d0370…

MALICIOUS

PDF

116.5 KB Created: 2021-07-30 00:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0d54808577341fcab92a202de002d892 SHA-1: fe2cd97eb75a1d4b50fc7d39f73968e8135b9253 SHA-256: 562ed6bd4e7d037007aa7331bac9c2c838d15c219b426485bfedd800b61edad7
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO-based malicious redirection. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7188

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
  • 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 http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160900030ed1cd---17101628356.pdf In PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/o7mgjegt40mtn93ohoo9qe6th5/tifigiruwudepawabov.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5f7330120---27431046662.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606ca06488c4e---49460440170.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d127e1a849---98247657937.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2e0db93ba8---wezabawoburawufoboduzu.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58437560967.pdfIn PDF document text
    • http://adveotec.com/img/file/85688951130.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073acb8d8f35---62257508117.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/ruxuso.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/1949874441.pdfIn PDF document text
    • https://progin.ch/ckfinder/userfiles/files/34977480222.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/kodegaf.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160809f1a05b66---limolejulusalixoduvos.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/5a2a19baabe1caa61c4c00b596062e13/bufidelekajigevumum.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a90353c545---newekusirujaxujafu.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/favevevug.pdfIn PDF document text
    • http://naucseto.cz/storage/7319383214.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/qr6q1hgd4p2q6boakp4t4bu19u/faxagenigifud.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/juburaxudapi.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/zofujetovemesem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=primal+chaos+gift+codes+freePDF 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_off00016e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E2C 10820 bytes
SHA-256: 71697de80920427443476d68d064b1806716b47575a5b45fcd4eff9e4520576a
font_01_sfnt_off000186ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186EF 18028 bytes
SHA-256: 92499777638a42efce4b84c995d696cc4e35a9f47c28b835e7308bf4657849bb
font_02_sfnt_off0001b6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1