Malicious PDF — malware analysis report

Static analysis result for SHA-256 02df867b4041885e…

MALICIOUS

PDF

80.3 KB Created: 2021-09-11 02:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e8f732b92d6d0d0bb55eb2a3ae4e10a SHA-1: 94670c33348c527079a6c457fdfaafc5a00f67f5 SHA-256: 02df867b4041885e8b4fb051141a3e08f0d638a75f46e8b6a6786ce267bd29e3
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm hosted on disposable domains, indicating an attempt to redirect users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document is designed to trick users into downloading a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://domilot.com/uploader/files/20431660617.pdf
    • https://ebooksweb.net/files/file/38299118501.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613340c276416---73373873923.pdf
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/19145154533.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/930d5t5dttnddnnbccqjnivffs/suledosujeb.pdf
    • https://yourownadviser.com/ckfinder/userfiles/files/dasunutoluxuzudiru.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2daee1189---58814847817.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff196de4fd---bamobemovomotubapupelew.pdf
    • http://museodegliarazzimarsala.com/userfiles/files/99184607944.pdf
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/1495742525.pdf
    • http://weiken-rc.com/upload/files/gudofefazagosole.pdf
    • http://seoulsquare.com/userfiles/file/fojekugowa.pdf
    • http://anabakorea.jp/userfiles/file/bikososafetet.pdf
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/kawikesuwo.pdf
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/38211378752.pdf
    • https://aradovan.com/userfiles/file/25080736399.pdf
    • https://coffeetuanvang.com/Images_upload/files/80989753800.pdf
    • http://hoilhpnqbthanh.com/upload/file/vubejira.pdf
    • https://maytinhdalat.vn/images/uploads/files/94220627135.pdf
    • https://propertiproperty.com/Uploads/userfiles/files/didiguto.pdf
    • https://igruppe.no/ckfinder/userfiles/files/86365764128.pdf
    • http://ekhoron21.mn/uploads/files/molekokan.pdf
    • https://pasifikendustriyel.com/userfiles/file/bevonopimutegelafi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=apk+god+of+war+1
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d668.bin
5e096d206ba903594ddd316abc76a56c743796563328ee054ecf8001e36cfce1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD668 17708 bytes
font_01_sfnt_off00010496.bin
96750192ea65d8400161ae089c9465823e9676e24bb7f8b274ddb7dd33a58837
pdf-font-stream PDF embedded font (sfnt) at offset 0x10496 10244 bytes
font_02_sfnt_off00011ba3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA3 16792 bytes