Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f630332abb0e135…

MALICIOUS

PDF

75.8 KB Created: 2021-09-05 10:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b59203a25d2913961b8f7ec1e39651f4 SHA-1: b1ad6ad21d79d092194e993ffdeb5968deaa6620 SHA-256: 2f630332abb0e135ece3c6129a21e1b80ca0f64284c74b087694de8f4eaa833f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains an embedded JavaScript stream and functions as a link farm, with many URLs pointing to disposable hosting or compromised CMS uploads, suggesting it's used for phishing or distributing further malware. The presence of JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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
  • 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://espritgt.com/userfiles/file/wopudiguzorer.pdf In PDF document text
    • http://bluekeydigital.com/images/pic/file/51232944449.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/bccfdb4347bf4e39a72a3ec241dc0717/liwilaviwizitonebonerimor.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/0e8bf797fde7a393b67ffc60761c6dd2/703284008.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/15898065596.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/379353263.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089ff8e7e935---gorodebavafifu.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/gavavov.pdfIn PDF document text
    • http://offerparts.com/upload/files/19701741610.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/8f2m8sq35movm8gdro2kjp6v3f/jarixisedot.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/22970687740.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/39643235867.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/31330046740.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/ba2119ee704592d35d03e694e2b0fe0f/65204842029.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba8253c6f3---48909815679.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/54236483372.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/tusemapimidetujilevev.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/junekubemafogojesujukelok.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba1f071827---55000364455.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/39356150660.pdfIn PDF document text
    • https://samudra99.com/contents//files/20890341474.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210811180508.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/bomivi.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcc0b86cc7---nogipajawaxewamudepozav.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/9e52894d2990ebfdd9e57d9fa0a58b16/notenotugoruvum.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/ribolovuzexijagofivalevan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=combine+multiple+pdf+files+into+one+file+freePDF 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_off0000c661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC661 10768 bytes
SHA-256: 02230f1cc107dfa95f78d4fd686eb99fa0dd045b5d537d179a161c87b2a350cd
font_01_sfnt_off0000dee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE1 16488 bytes
SHA-256: 4095912669ac10a1c86d7d96486ffd3351f006ea1c6a3812ef54d7cc85712f3a
font_02_sfnt_off0001093f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1