Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a80202a0d4511b9…

MALICIOUS

PDF

80.3 KB Created: 2021-10-14 00:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4c888798abbf370e396567c6d74d19fd SHA-1: fc812d3b24838a0975b1b2993508387c61c693b6 SHA-256: 6a80202a0d4511b9d4ace3d4129d8522cb21d36a526fa3ee971520f9987aef85
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to disposable domains. One heuristic indicates a link farm on disposable hosting, and the ML classifier strongly suggests maliciousness. The embedded JavaScript likely serves to redirect the user to a malicious site, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://aksaaydinlatma.com/img/editor/image/file/jeledofiminisavikituj.pdf In PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/85910853841.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/maroratomilenoxobox.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/vikadadajo.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/wubiveriwaj.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f02105b894---2249253108.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/46676006890.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/74816894869.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/guvuxafezikuwew.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/wepigesexedidudedave.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/kagowaweboraker.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/pigivipofanidol.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/kikoxekigose.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/19669020993.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202110062223435736.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16164bf507321d---lirofu.pdfIn PDF document text
    • https://sowlindia.com/userfiles/file/2750945676.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/ruwavexevosefuzipati.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/najuzejolotiga.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/90013988520.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0972997001631797915.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/tgwjJlsMqHc/uplcv?utm_term=misrepresentation+of+a+material+factPDF 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_off0000d370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD370 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB87 10636 bytes
SHA-256: 8f0a7fd5c247e5688be73347a991553b551e4a99c4f7cd95a18a927923d73004
font_02_sfnt_off000103d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D5 18568 bytes
SHA-256: a0c61cb09b0482d93af18d31e197099eabc7f3872121df782dd5fb0a95bcf97a

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