Malicious PDF — malware analysis report

Static analysis result for SHA-256 9497291a9a6df6d3…

MALICIOUS

PDF

65.1 KB Created: 2021-09-01 23:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9b1627545d2fe1f7ea0f21aedb84d71a SHA-1: 52873a5c0cfdd566898cf7f50fdef8abf5801e15 SHA-256: 9497291a9a6df6d3c10c77bae16e73035aaa61e7ce0c761bca872ae5d8b8ebd7
154 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to lead users to malicious sites. The document body is unreadable, but the heuristics and URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7964

Heuristics 5

  • 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
  • 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://gachbinhduong.com/upload/file/36945564882.pdf In PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/acba35a2fbf491566b4adbe51cc06f56/82846811550.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/vl3rk759g80el120h031nv0eo3/zesazowulikoriragegomi.pdfIn PDF document text
    • http://kisito.com/userfiles/file/41625223731.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/62966304471.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/64382219013.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/ganovap.pdfIn PDF document text
    • http://bscartridge.com/pic/20946926028.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/davojedurobodubofefaxu.pdfIn PDF document text
    • http://lhs1965.com/clients/880801/File/sovadapusobunajani.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/2c667c742d91d0bbfaea55ae5c561370/31867956940.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32522103230.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106070744294294.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/jokulosa.pdfIn PDF document text
    • http://jimigubellifoundation.org/clients/f/f9/f96c94eea877db95ad0a8b6fd709b1ed/File/34636503766.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a44e34e39e4---34675584377.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e9131831cd7---92514507213.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/50ce65631fe3d49d37d1219af00b06b5/8100618956.pdfIn PDF document text
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/84979229328.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/xodarisedurizokopijezove.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/depizabeniruxoxurajomi.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/1092986889.pdfIn PDF document text
    • https://fanaf.org/article_ressources/file/68665658580.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714b7bac62f---38758031399.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ae4cc2856---ribamixasexubawejusuv.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/zokozanorireji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=plastic+bottle+triangle+1PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA94 16960 bytes
SHA-256: 1afab26e61ad858147b6ea497d33b1f099b49294d7ef20402d309827766900f3

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