Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e98b40c94e0e2c…

MALICIOUS

PDF

62.1 KB Created: 2021-05-15 16:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c79e42c3ab1207f799e46f213b9a377e SHA-1: ea9f5addacde33a842ae7fd98e7224e334cf68a2 SHA-256: 39e98b40c94e0e2c5d353eb0a33f0ebb100b2954ef5d0cde54dfec7f57c615a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by multiple heuristics and ClamAV, indicating it is a phishing or trojan delivery mechanism. The document body, though obfuscated, suggests a lure related to interview questions, and numerous URLs point to compromised WordPress sites, likely hosting further malicious content. The presence of external URIs and link farms on disposable hosting further supports its role as a distribution point for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6609

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://coretry.ru/uplcv?utm_term=shift+lead+interview+questions+and+answers PDF link annotation
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609697fbd5b14---gakewinimolazekikoboj.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/45522451849.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b70f187f2---39233787107.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2a75e956a---bodirenarawanigufifuletid.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/1303ddb5fdb36da2f0e5cac9d0558244/zevejomobowub.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/jumubowutisuvan.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f597b8c332---labugozakekid.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607549acc877f---91473116683.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/h5db3coe6ct2sf615jlt7t9gbs/46152817212.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/48fd6f9aad7f8552242ea7d2164a402e/sasesu.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc667e3eae---42575557015.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/t6dcnpsf15kmj1du0ufnmg11gj/74058879812.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/c86f6ce667c69b223a7b07f44833b8e1/jemanes.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160983df485b4f---87108924071.pdfIn PDF document text

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