Malicious PDF — malware analysis report

Static analysis result for SHA-256 602adb0df7a7f7cf…

MALICIOUS

PDF

83.7 KB Created: 2021-06-14 19:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 572d04e5171352f7669d8b62ee1f9b53 SHA-1: 8ed1c31c739574365eaf16e3b8744f42cd3df9c0 SHA-256: 602adb0df7a7f7cfac347e6c8a59b7c8864b55d65696ff8f9d6cb535a3c67fa1
156 Risk Score

Malware Insights

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

This PDF document, identified as malicious by ClamAV and an ML classifier, functions as a phishing lure. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content or phishing pages. The document's structure and embedded URLs indicate a link farm designed to obscure the ultimate destination and potentially evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://infrive.ru/uplcv?utm_term=verb+tenses+explanation
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd4cfb10f0---ramijerixinawafosisamu.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160990317ba3fe---xakariduloveguxepupitexuk.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/d85257c956322e3a736b7454afc7a083/gefubipu.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/27ca08c88ab4a945504df979eebd2da3/rakodopamowidutogoseva.pdf
    • https://arvikabc.com/images/uploadedimages/file/fuwidofe.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a007ccad7d.pdf
    • http://cokhixnktientien.com/Images_upload/files/perevuba.pdf
    • https://marljivo.hr/UserFiles/files/pixivafubegopukudoxolakoj.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3969b8cd9---vazoloxid.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e77e305adb---99949123822.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083df71061ea---59586664993.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/a5874d87c47e07d1576f6c9ae7e3050b/xutonejazif.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/9ed86bbc39f29c6cf6f9e3d22cefbc95/gokakodeko.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/3d06b8c607b785b4006f8f3318cfb239/3397992679.pdf
    • https://muguet.fr/sites/default/files/file/momapenizir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010209.bin
e4b10b6097f3cb9b267e0d5fbbbf5e5b7cb0e83880f9fc65c334b1a39e6b2439
pdf-font-stream PDF embedded font (sfnt) at offset 0x10209 4984 bytes
font_01_sfnt_off00011301.bin
1182553af4e4e1d4f08dc5c53a41ba3cf7bb24133579164eb638a84c8e765df2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11301 2012 bytes
font_02_sfnt_off00011c34.bin
c07c8d81fc0b99a96619940cba5cc09fe47b8249b93fd20945a69820cad9d146
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C34 11060 bytes