Malicious PDF — malware analysis report

Static analysis result for SHA-256 125cd1a61ebdbb60…

MALICIOUS

PDF

67.9 KB Created: 2021-06-26 01:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 67735ce17b040f6e13c7aabf9c54bb0d SHA-1: f2792d261dc709a1112276019cf7e8b6ccd40fe6 SHA-256: 125cd1a61ebdbb60165fd9f4a5154e44278b110c7f4ff4d5546b6647d0706f5a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites. The primary purpose appears to be directing users to malicious content or phishing sites, likely as part of a broader attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8336

Heuristics 5

  • 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
  • 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.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e0617f4d8---duzisomuv.pdf In PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/f6768c46f5a67e7f7bf37ce18a7b107a/5722551113.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/6a9f6b3afe99ecb049232a81e210b267/potekobirorujaxedodexibet.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/55280654923.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/88309464213.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c3a6a94b0---ruvupiwewuragusenarifob.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/ade68082e6b8c094f2ff12b4368fee34/sefomemusoror.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/mefuderinedimerolitomu.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712020d7be5---6991677012.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/7iba4l2ml77sitraejftaehl0d/42054196660.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d27a5fe016d---wafifo.pdfIn PDF document text
    • http://sy-smile.com/upload/files/tuxikaxode.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/16238743671.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/bb831de80967755c9ba13589341c9f77/26712550276.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46633ccb54---xokonajozoxebagovigufo.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/tovaxibuwufinosigusirofu.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c59ae36224---30975295710.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/38651745335.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608245ab16e0d---82577361079.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/kerak.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/44e2a6741be565f4f12c2b7e43845256/muzepugolu.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/23577501928.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=unicorn+kitty+mermaid+coloring+pagesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 11068 bytes
SHA-256: 30c68cc231b848e693cbaf3b6bbfd79b44302015311173cf53f0991e69bed831
font_01_sfnt_off0000fbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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