Malicious PDF — malware analysis report

Static analysis result for SHA-256 914c39b42a93c4fd…

MALICIOUS

PDF

109.7 KB Created: 2021-08-12 23:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 32dc8a1ba3451b2dd4a75f87024fe2ab SHA-1: cdbc367a4881ea4b40d459ce5fd0967f3212ee2d SHA-256: 914c39b42a93c4fdd654a9fb23bb9ba4263093717e7f95bfb2ddac24a2192b49
124 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The file's structure and content indicate it is designed to lure users into clicking malicious links, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.1277

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://le27.fr/docs/file/90320878917.pdf In PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4a48b503eb85944e3a0f2d3259494cf4/86281201390.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210701_192922.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/c6q1g5aohlddq0av2k7k7f4601/rovafudolefulodebopozabuf.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210803075934.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a17d126a134---ninibekumumetenarewuwa.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608c901d3a194---jemifumisedokobiwinaz.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a86e8b3e87220093c4c7a3c11d39e4ad/51523752038.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/5d03c918f5164b5c5825444a6998c63f/93819202532.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/9v4570jkiaa23pag4bm4jin0o6/gudogudesusiruzola.pdfIn PDF document text
    • http://newo.ru/files/files/zugapotaxij.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608458c8258e0---jowipizuwufirinere.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a46b4f8e18b---sokinukax.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/f1a7e90f118bc253bf54967ce8c17cd7/lokijumowag.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/ea161fef58ea56091b473ee91e2a107c/sipulufujesuwoti.pdfIn PDF document text
    • http://top-conversion.ru/ckfinder/userfiles/files/bobexevodatupekiwepivaje.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160945b5da4063---40545743419.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098801a8e281---91672684247.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/38567335321.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/31fc1f05e6316ae96b6e203c8e302979/futebopudifo.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a0525d3573c903f1d3339becea1ebbf1/35381295336.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a967f4657bc---lagigone.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/gujovawaxode.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/87576780258.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/n2553q6sip4uj8thprr589fgc2/xomujezixuxivuxurirof.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/91381719240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=age+of+empires+2+hd+edition+multiplayer+oynamaPDF 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_off00016b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B52 20604 bytes
SHA-256: 01f0510325983d133b5c6f111e67bc57e3a8f9186345cec0306500cc52980210
font_01_sfnt_off00019e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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