Malicious PDF — malware analysis report

Static analysis result for SHA-256 96800cae67dee22e…

MALICIOUS

PDF

81.6 KB Created: 2021-09-11 03:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 8f82c6d96c3f9f92206e1f518e5b878c SHA-1: adcf6adf0dbcf9b2525d8f56f552495b94188baf SHA-256: 96800cae67dee22ea1028252e2da6f0ee55c51f659b77ab4e5f39fb7afa6b07e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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
  • 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://arrayamed.com/userfiles/file/9737693558.pdf In PDF document text
    • https://kalashad.com/userfiles/file/betabare.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/72424792343.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109051809093154.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/482b7f55baf376985f33ed916f674358/31569995568.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/vabozezeduxudusigopuwa.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1613284412214a---56185819846.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/87653280533.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/vetajumozijazef.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/wazuxisin.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/fuzotexareze.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/mulutegazereguzojezadu.pdfIn PDF document text
    • http://agrion.org/upload/fichier/10998257141.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1631314024.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/30126103199.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/xijen.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/34122578363.pdfIn PDF document text
    • http://quranday.org/userfiles/file/67336621075.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/34700134356.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/28952283683.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/98930406846.pdfIn PDF document text
    • http://health-bridge.in/upload/file/vopigezuzamaludidad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=room+at+the+top+streamingPDF 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_off0000d94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 10696 bytes
SHA-256: f5a5bef6f9acf2a9b788e57eac5e80b316d866efa2ea0fb1b2b91c60c35a40a7
font_02_sfnt_off000109c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C7 18052 bytes
SHA-256: 33b22fafc70f13e6cd190443f8c2e3c88cf719b24e0da8016d12df82005b998a

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