Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa3e15683c69ebf…

MALICIOUS

PDF

58.9 KB Created: 2021-09-17 07:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 19dc57ea432db1b66d7f0cba66b11654 SHA-1: fc3d32e60dd70ee639082634a4c7905bd18af126 SHA-256: baa3e15683c69ebf1ae7f7b9940513e65ed7f7fe914315adfa3a6e4a7f0b123b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of multiple external URI heuristics further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6589

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://castel.ro/userfiles/file/15490594315.pdf In PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/dijupiroseg.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/82528837981.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/furanuwutog.pdfIn PDF document text
    • http://snkpost.com/fckedit_file/file///20210913_9_51_17.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613341697b5a9---42501612801.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/75995568454.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/4174924664.pdfIn PDF document text
    • http://gr-chem.com/upload/files/vidudifufolakesukelapade.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/duvevatemavolimoputivut.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/79335897496.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/gesid.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/37169550562.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/tabuzeze.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///taxaremubo.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613984526eb71---tudefapaxuxugub.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/2d97a6aa774a46a91b899bf062a60091/68384509586.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/wununegasofariba.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/27340668950.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/746c6ec9d9d3613c707c4d9d3880a76b/bezabajub.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/surelinatavenudoforej.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/51600102458.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=top+war+battle+game+cheat+codes+2021PDF link annotation

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