Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6fd65d352f65176…

MALICIOUS

PDF

80.6 KB Created: 2021-09-01 07:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c3d051b6634f567e504768a174d640cc SHA-1: 2ed9641c0f8111fc92ea28014de1780714bb0f58 SHA-256: e6fd65d352f65176d1ce126227503f4ae6f86832b4cff17528205e1b6116dda7
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use WordPress upload vulnerabilities. The primary function appears to be directing users to these malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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.
  • 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://cvsc.co/userfiles/file/95520972447.pdf In PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118928c9ac45---45805042425.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9c2a589d2---jilidugafovebuwitefibere.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/743809055.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/30403833891.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/kctngeibilv6e47d7stk0rj1qc/33760085408.pdfIn PDF document text
    • http://sakem.org/userfiles/files/tikeligagux.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/gulevogu.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e637aa0489---witafixepidapu.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/sujesamijarexugixi.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/60094407145.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/78517361129.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/xetofukoze.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/26900620288.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/98190248924.pdfIn PDF document text
    • http://d4sontario.org/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/kutamiriborazisuja.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/7452322163.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/26137660316.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f389a23c799---wapipolakaromak.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079304ab892a---rojefafiviwejizunufos.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/71113314506.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108ee6d0d927---77347266229.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610809a62e84f---83849425248.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/7731448933.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=geometry+project+ideas+for+high+schoolPDF 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_off0000d477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD477 11248 bytes
SHA-256: 0b446a1163a985559989c11eadf3ce0d484f3651cd0faf96ebf68a9839fd1e4e
font_01_sfnt_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BB 17508 bytes
SHA-256: 3769c00122a487c6e432d122326a0b96dd281248e8523dc5cfd2370b3f032737