Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c68c18a5aa16abb…

MALICIOUS

PDF

57.0 KB Created: 2021-06-05 05:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7982d570a08ae5afc6c7556798438734 SHA-1: 81f08795bd37837ddf7a80c36acf649cd22204cd SHA-256: 5c68c18a5aa16abb19a41ead8a9c0461bb42c84c44d9f522b5038be1bd938881
154 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to various websites under the guise of providing free game DLC. The presence of multiple URLs hosted on compromised WordPress sites and disposable domains, combined with ML and ClamAV detections, strongly indicates malicious intent. The document likely serves to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9350

Heuristics 5

  • 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
  • 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://pistant.ru/uplcv?utm_term=how+to+get+rocksmith+2014+dlc+for+free
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/iorvm77kb25f1d9mk54573ge8j/xixadolubosawokumimimixa.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/f83281a0f329f3e819bae18e58e9d16f/73814035850.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8772791abc2ea3cccb33fe6b2c122a21/39569800319.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/5e86bb040d5b84e7b9f9181cf8b58bdf/94299697340.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fae1e37dbf---naxilavaliwizaxodevuveno.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160901071b3412---449965316.pdf
    • http://alexandraharris.com/clients/36054/File/28875213247.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a85bd58162c---nudevaxi.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f14163aab4---lonagevaganulit.pdf
    • https://medtek.vn/storage/file/wegajofiluxebeji.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12f059589---vedurimobajo.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa6laeebjj31u294ivec2a3a1t/34017753489.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/b43e250cf287ff93b87d1e4d22e0ae81/kepaje.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/fb333581593b4e346c45cc93de55b68d/vijukerukedifaduxatof.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/0b7a0504f093ccdd4a619f55ed7fa44d/nogajepulajebutafowolum.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/14fdad287681537ed2ecf4b44633d9e6/lojaboxoredabok.pdf
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/lufuwofodafuzi.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/4af2ec9dc4ca70e1cd9bdf0d4c659e31/gosokazeg.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/9bde65393aa455bca0a6f724c60245f6/31693028520.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0d8.bin
122ad960f6772d5eed453ed6b44d887c2934ef7ae9258768e167c8ec3735b72e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D8 5756 bytes

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