Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bfa26222e23a80…

MALICIOUS

PDF

83.2 KB Created: 2021-08-04 05:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7dd240400332435c3fa365d07ee861e1 SHA-1: fd4f11c61c327b4e724a72483ce15afa535c271c SHA-256: 47bfa26222e23a8046b34156d42cff62748fc947953d28c9264155b58b2236f4
162 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host phishing content or further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a phishing or trojan delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5890

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.
  • 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
  • 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://medvor.ru/uplcv?utm_term=what+is+a+mental+health+first+aid+officer PDF link annotation
    • https://www.tristar-technology.com/ckfinder/userfiles/files/paziwowanegosoloninolafi.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/ranazofolerudizesip.pdfIn PDF document text
    • http://ladue69.com/clients/876446/File/82146351030.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/b13308d9fc4063a6fd379d5dc7b319bf/16783644232.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/wapotusiwu.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/gemefov.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/0kgptue11tdi47kk4f9da3omgp/90299441115.pdfIn PDF document text
    • http://atrsara.ir/resource/files/nijelabufokaj.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107353cc66d1---lafixireme.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/89ba3c5383d6c41675a1f5f17459bd60/zupovajugojukag.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/27109937824.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/bc97713f5c6095d6e31fe50414bee364/38669771430.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/66920840510.pdfIn PDF document text
    • https://paperland.bg/uploads/file/39815969628.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/62304141143.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ff342d9e7---xewibewa.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093bb62cfb9c---60591613319.pdfIn PDF document text
    • 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_off0000fd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD36 17968 bytes
SHA-256: 4f340341fa36fba0c757999737c2a5ded773bbeb24113192c88ad0394397f1fd
font_01_sfnt_off00012c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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