Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb7d946517c96d1…

MALICIOUS

PDF

69.2 KB Created: 2021-07-14 07:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cfafc94367e273ce6a63ce63a308149d SHA-1: f6285e0b7dbf081347e643705b657068a9452e88 SHA-256: 0bb7d946517c96d1eeded09c89226eab7acf0bd6233e588848730ca9e6326ace
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms strongly suggests an attempt to lure users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6770

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=rate+constant+for+first+order+reaction PDF link annotation
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16078d7a483b32---84453422359.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609695a3cc36c---40691307755.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/bujori.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5b801f8e5---sokizatev.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c7059bc6bf699cee4e6180622dff88c/45554563218.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/42658665479.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/12hg4s42bojph8412hn042ugi2/80529138933.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a6d07e20e---98287536204.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607155959d168---wamunotaworufaje.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/xemidunuwemewawitoxuge.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/adqh4tleffjtl5lc54oc3j59fb/63799647169.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/73049129743.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/fiwutuxarajitas.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/918c210693b9a80dd53de2afce49d884/pamivulo.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/ldbimjdvnanvfluj32rgvbiiv3/vuzidejunexikap.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/36581375485.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/89462112509.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/c655927de5d54f479655cc24407ec1fe/25689359943.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607c69ff85cf4---nojisowalexemomuzelevadid.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085da6b2146b---32638455862.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/68946005804.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/xakomotozi.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608731fc5eb1d---pibapewujero.pdfIn PDF document text
    • 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_off0000fa2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2E 10468 bytes
SHA-256: f77e1a723750f22798a3ba4f3fd149ba5ae2166d74382c7c7839d792f5543798