Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fcd03600fd58c2…

MALICIOUS

PDF

79.6 KB Created: 2021-09-17 06:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d4a78c04e544119199a5343f3469da8a SHA-1: 72306fe9466207a55cdb7bda55ac444a54ac8f4a SHA-256: c5fcd03600fd58c2c6d6e50dc0ca99322af4abacb111da8c1633b9f5af63cc84
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URLs, many pointing to potentially disposable domains, suggesting a link farm or phishing attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document's purpose is to distribute links. No scripts were extracted, but the overall structure and heuristic firings strongly suggest a phishing or malicious content distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138eac665610---79788677446.pdf In PDF document text
    • https://davidfoleyinc.com/userfiles/file/23759123532.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/55996092062.pdfIn PDF document text
    • http://ternovykh.ru/content/file/zelofuxilitisu.pdfIn PDF document text
    • http://snsi.jp/image/news_file/mirebifo.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/bakomegirebumomilidupik.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/27730534594.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/gipamaw.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/77577981361.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/75128940350.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/84313225454.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/99851531859.pdfIn PDF document text
    • http://sial.pl/galeria/file/15380452318.pdfIn PDF document text
    • http://mfahk.com/upload/files/fipiwaxiwurubetif.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/2186843578.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/64665061721.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/sixifukasadasosikajodej.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/kisagesawotosilojenezate.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/vakulefubukido.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331aec5e96d---muforodeniworumuregunugo.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/43429156433.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/57673221103.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/vukiwoxawi.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/26598656521.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/92632002444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=pokemon+xy+free+download+for+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1F 19328 bytes
SHA-256: a284672a32cfbc15d832d20dafca96281fd122a8daf331bfa546b258c643a349

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