Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e01e4630678ab0…

MALICIOUS

PDF

85.7 KB Created: 2021-07-16 21:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b9dc2d9e7da4c51b21ace4ae468d3dfc SHA-1: 4f2e50f92d9647aadd807241cd8085fb0e1992a8 SHA-256: 96e01e4630678ab0771ec6befb60a027c032f6e1caba57af924f3b0b62e9418d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload directories, suggesting a lure to download a password-protected archive. The presence of multiple unknown URLs and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic strongly indicate this file is part of a multi-stage attack designed to bypass security gateways.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • 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://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/aefa4968aab46e2e541d286296a9c1db/sonafu.pdf In PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/05c91b587a0af932eb26c9d1f12704b0/77802303055.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16250479163643.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/35cc0b650c024a85beda3a2dc92c0160/51363912406.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/telez.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/kevumigevikoxopibufire.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931831dbe9f---merulowonukerarerib.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/65270183647.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/qqjh0rohggf4au2s6tlgl3hikd/rubevujinugidimimobakowo.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608129a71d2d8---vanibefovugefiboluz.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071de74680c0---wekepileju.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/044fcdb651fa519b3e7573b35ee1a97b/pinojapowukos.pdfIn PDF document text
    • http://k1a.ru/images/files/file/magafisul.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/39117938047.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d279b0aa84---96602752648.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/bamivov.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/36348657015.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/fexig.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afe869bf4ba---92050440564.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/6551589105.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d530e3787e---dusoxi.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/ganuriwisag.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d507a5719d---82056138499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+zip+a+pdfPDF 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_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 16736 bytes
SHA-256: 4876659905827c199f84d0d9ac07fc7b6577c2489ab19ff892df667b27e449af
font_01_sfnt_off00011b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001336e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336E 10080 bytes
SHA-256: aa3d4bf167ae75624869bc1dd2e8cf8c1018ce3a1f8b87702b2dbb98cffcc6a7

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