Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0be65ee14c22c78…

MALICIOUS

PDF

62.4 KB Created: 2021-09-12 05:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8af6ece5d9ea18bb24f3463af94cee18 SHA-1: d716856eeda71d93317902907dd72473a38123a1 SHA-256: e0be65ee14c22c78b36eb1a82d6bc6f5f6aae10a7d75ba9105170e70f7b7f465
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious content. The heuristics indicate it functions as a link farm, directing users to numerous external PDF files hosted on various domains, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7090

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
  • 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://nakakinpump.kr/fckeditor/upload/file/9208939069.pdf In PDF document text
    • http://stamforgtechnologies.com/uploads/98779498728.pdfIn PDF document text
    • http://medrea.ru/upload/files/79313748862.pdfIn PDF document text
    • http://cecev.com/stockages/files/23920657460.pdfIn PDF document text
    • http://xycrusher.com/d/files/88742790305.pdfIn PDF document text
    • https://remini.hu/userfiles/file/73769129644.pdfIn PDF document text
    • http://ridendo.cz/files/file/79404649555.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/563650621.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/lobivumawedu.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/92440288355.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/31987526670.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/53333233908.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/minowofipupumu.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/88415972664.pdfIn PDF document text
    • http://1careglobal.com/upload/files/funudukamelul.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/lefewajomufiditadimaraw.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/34423646618.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/7c740aae140102c0466c1e73442f5982/18667945448.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/fegina.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/15814550743.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/fevunimavizakinabiruketur.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/degatake.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/rexevuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=simcity+apk+unlimited+moneyPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77B 10788 bytes
SHA-256: 42a7c1a46a5020a357dd4fad5816892cfd3c059876eaf7dad24015afef9121ca

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