Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc854a80e405be9…

MALICIOUS

PDF

71.8 KB Created: 2021-09-07 07:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 83685d77a8a61bb17d6a3122069ce906 SHA-1: 2f4859e6a7f9e76ebbd4511c041f762edf5f58b4 SHA-256: afc854a80e405be9cf1c6782d8169737e4b528c58dab4f52776e04f4f475a637
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous distinct hosts, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely to redirect users to phishing or malware-hosting pages. While no scripts were explicitly extracted, the PDF structure and link farm nature suggest it's designed to exploit users via redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6550

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 http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a8da1edd1ed---58403372958.pdf In PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e29dd4385---zudiludegenexufulaki.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/33738447185.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zetisujiloravumoz.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/danozomaditarikiwovuf.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/52831713775.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/14904de6c8c1205861dab3f43f4de14f/lelunotoxe.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630058212/files/79687758600.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/b68d7c6b2c9d2c09f81d50d2df0a0083/demirefowijow.pdfIn PDF document text
    • http://u15.ch/ckfinder/userfiles/files/415441877.pdfIn PDF document text
    • http://thedreams.cz/files/rebijadimu.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/mozowifasixadene.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160722c662e36f---25725179838.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ecf5ca48e---wutilukaxazezupoxapokag.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/weludadutawuwape.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123b97499852---48133680248.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d6010a813---xedumobamugapebineladi.pdfIn PDF document text
    • http://home-delighted.com/user_img/files/66576452166.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/vibotixapabigagorodowal.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/64161940879.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/e5d2862d36a056d9a2d43d4f66171d44/67801475672.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/siziwemasedavu.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/basuweg.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d70d9abc660---31139378303.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=animal+classification+worksheet+5th+gradePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 20792 bytes
SHA-256: ee67e6c5336fd1e29906dc33e6ba00ee8e6f8114e8590d1728c68e7c0e2f9b32

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