Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02adf3cb94d5b51…

MALICIOUS

PDF

83.6 KB Created: 2021-08-17 15:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 153e30b00b97420b733d0b958eab7983 SHA-1: 9ffcce81d4443188cd28c1d21f70ac1662fb7a66 SHA-256: e02adf3cb94d5b510f6c9870985496b48e50141355139aba1f34f2ffa100c883
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous links pointing to compromised WordPress installations and other disposable hosting, suggesting a link farm designed to redirect users. The document body is unreadable, but the presence of many external URIs and compromised CMS upload links indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.
  • 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 http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1b2d4d6a4---jofibovaludemosakigi.pdf In PDF document text
    • http://dajuicebarus.com/uploads/files/32719876467.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcaec1737f---28348820841.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/sec6pcq508ngugqv3u5c6hbno6/3008645960.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16084f8054593f---burotadifulaginibipumoted.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/wivabowibulevuxixib.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1525b3dcb60637da8ca4e24eb452bb0c/44131478259.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/1c1f529ece736039240be8e0749c9316/57268548801.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086933ea4b13---rirozuwebow.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/jujatilapofokudodidekemok.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/dojujoturevekolov.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/c9de2688a2f5268a73943219c83b3967/57823886962.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/9570024afc111f22a9eb31db216faf0a/vufozabuxin.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbe3a0f92e---xovezinunulul.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/gefujasilitudujigusanema.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608158fb7d785---96608894078.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/1lpv2aa4vc7uk8pdpjb87da11k/81160482829.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/97713679364.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/47549068151.pdfIn PDF document text
    • https://invest.pl/userfiles/file/33532107972.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/2912138692.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/e3efafe9589cf68a22e6ba807b65ebb8/63742969165.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/37021621058.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/07509e05d7f4f45d086942c58e56df12/84570376812.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/82047310731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=oraciones+de+presente+perfecto+progresivo+en+inglesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 10888 bytes
SHA-256: b7b1bf7c73930b02057fc0d65cee66db74e3e8558b1757fcc8b4bea85e1c7efd
font_02_sfnt_off00011121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11121 17512 bytes
SHA-256: 08d6745f5ca3032990e8252c95f9179121de51a2be74ba1f0589c01bf5fcdeea