Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2faa7a8e6783444…

MALICIOUS

PDF

72.6 KB Created: 2021-09-17 16:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0f52d92ef42ed0c9998eedc2afe2e6d6 SHA-1: 4c04da5eaef3020e89d6dcddcb1c76ffaef2e791 SHA-256: d2faa7a8e6783444f93ef44e3861091856424c88e697da8729a588d50ded2a7f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF sample was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains embedded JavaScript and a large number of external URIs, many pointing to disposable hosting or compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The embedded JavaScript likely facilitates the redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crysiq.ru/uplcv?utm_term=dil+diyan+gallan+movie+download+720p PDF link annotation
    • https://umutisi.com/umut/upload/files/54330271973.pdfIn PDF document text
    • https://kvzriu.org/images/file/vajizupikajugi.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/73899641444.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ccd0721ece0658d09ef1724fa4bd3c82/97250857618.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/nokilokasobutibodop.pdfIn PDF document text
    • https://gangnampools.com/contents/files/23967448240.pdfIn PDF document text
    • http://knipia.com/userfiles/file/24493276036.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/44273030865.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/xogorogirurajan.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1f712a1cd---bijigemajekodaxoxigukazu.pdfIn PDF document text
    • https://fasaac.org/temp/files/98705796511.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/darakanifolumugorawipi.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/gigagovetubifalagosi.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/49665395855.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0d2696a2f---laperofutojefavixuxozale.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/gewej.pdfIn PDF document text
    • http://195exim.com/datas/files/kabokimejosumu.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/witiragatowedip.pdfIn PDF document text
    • https://superchills.com/userfiles/file/sisoderugake.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/65735152813.pdfIn PDF document text
    • 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_off0000b5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E9 17792 bytes
SHA-256: 130ac207b225db1ead0155657397a6abc4bd049e37051a105ae80f716734be80
font_01_sfnt_off0000e3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 10928 bytes
SHA-256: 9444a59fcf7eb43d81e5397d0fd2634746f8f6307885a76bee93c82b0584604f
font_02_sfnt_off0000fd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1