Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3367026c2b92ba…

MALICIOUS

PDF

74.8 KB Created: 2021-08-07 02:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0abdf5d3d74bece7bed488ac273220a2 SHA-1: b54457c2dbe3256983a7f775b2ad2fca22adf579 SHA-256: 9b3367026c2b92ba6424a07d7d52c5f5ca2a19c80a130f4cf64372078638ee75
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript which is likely used to redirect the user to a series of external URLs. These URLs are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or SEO poisoning campaign. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7770

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 http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160afa0de7dc23---87667698772.pdf In PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/c719c642cb74b40b1a817cf3b2982218/68073716586.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/zivefulixinim.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/5f5ac738d956f6565b85fcffc5e9d270/jimofemigopumexax.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d0d08b3e51dbcc855df52aca3bd1ec6f/pesifepug.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/7da8ggfnch561vpgc6u7etsi4k/93411394851.pdfIn PDF document text
    • http://novichiha.ru/pic/file/88781404898.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/j9g85e9m960enbud4d1tkk18vv/79734371769.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850c528570e---daxozamizudeximoziz.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a8020c3c43ab9c9ddbf737328f337136/zagula.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/52884699210.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/17506339695.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e66bf67ab37---zoninokizowaxe.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61c44432e9---37940022645.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/vubibeselu.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/54953493561.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/vofepodozovebikarulak.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f729b02708---dopepu.pdfIn PDF document text
    • http://keacg.com/upload/files/geriboresosanodojo.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b52d7737d9---meguboz.pdfIn PDF document text
    • http://pb-book.com/user_file/file/8815943275.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021073108474273499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+make+a+paper+calendar+2021PDF link annotation

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