Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fd54584eb6224b…

MALICIOUS

PDF

217.7 KB Created: 2021-07-02 15:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 382093c9eacd00612c3f20e87703443a SHA-1: 4a14a7b952bf18ba5b182b2cbe8fda918e93a683 SHA-256: b6fd54584eb6224b02f1bc9a6549d984f8888ef95d736cee3a33388a8d722c72
166 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of multiple links pointing to compromised WordPress upload directories and external URLs suggests an attempt to redirect the user to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely contains instructions to decrypt or access a password-protected archive, a common tactic to bypass gateway security and deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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
  • 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.
  • 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://huntic.ru/uplcv?utm_term=indus+valley+and+harappan+civilization
    • https://artasedanasingaraja.com/uploadfck/file/wevolikerizuwesisajabop.pdf
    • http://akcjonariusz.com/UserFiles/file/15959306342.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/kumh9jpnq5rcgmricojb2ou55g/jigaduxenufikifo.pdf
    • https://planet-for-events.de/userfiles/file/14881368659.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6c9be441c---fukubabor.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad7700a791---zijitopigunuv.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad8953685a---15442318266.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/6a0c58e5741f9937f6fb95b495ea39f8/71209685691.pdf
    • http://asesorgubernamental.com/images/file/wivifugu.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/0b7f461c670caa755ab11c0e3a65a72c/8043041859.pdf
    • https://bosgo.mn/uploads/files/36531677399.pdf
    • http://ketoanaca.com/uploads/image/files/popuzejenedunobojigaletu.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/20856a38d235e187dcda83ada39430b4/82229701330.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad0e9ee24f89ab5297f719a9da7707bf/26210948752.pdf
    • http://koreanhotpot.com/uploads/files/81280147761.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a40d60d6883---8133387868.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e108e52ce---52007158368.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/8180a34bdbff25960d6501dfe602d035/nopotiv.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b689709291a---laxiwigorowelova.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080f76fda0e0---15268634236.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3a5374fd2---20834251517.pdf
    • http://drukarnia-skawina.pl/app/webroot/media/files/tawarifuwi.pdf
    • http://clubselectionvoyages.com/images/file/wozofarefimi.pdf
    • 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_off0002f35c.bin
2621f80672a63fb9911371aeee82be6b021f46a8968e62e6307ad964edf04e74
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F35C 20012 bytes
font_01_sfnt_off00032668.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x32668 16792 bytes
font_02_sfnt_off00033e7f.bin
3a806273c5b19b28ec547096df6f469ac91b68801118073a02f59660a0b30a8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x33E7F 10904 bytes