Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f120d0da924e5a5…

MALICIOUS

PDF

63.6 KB Created: 2021-10-06 15:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3e70c8e891f7dd39850a0a9c130cf19b SHA-1: 120beab299e890ea439869aad8d584b8b5825f8d SHA-256: 3f120d0da924e5a56c8f0341d32319c94e72f5a7bdd0bf0f1abe5a731682376e
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6902

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=how+to+compose+a+melody PDF link annotation
    • http://closehorses.com/userfiles/file/jidasorowibesazeg.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/1033464783.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/sezawabifimenit.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/nonekakejoxerekijakedo.pdfIn PDF document text
    • https://baoholaodong24.baohohoanglong.com/userfiles/file/1176296204.pdfIn PDF document text
    • https://yogaspotny.com/userfiles/file/10901249319.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/121c3619f883811d1912182bf835dc86/xemuduzozijuzifelazid.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/31501045534.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/rijafirefebumiburoginapu.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/10/04/66156867629.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16136390d0110f---11737387139.pdfIn PDF document text
    • https://mikludava.lt/images/files/fulawetaxobo.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/47520934411.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/jotewisi.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/35866797280.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/letiloxefobekuto.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/25370443972.pdfIn PDF document text
    • http://csp.hu/editor_up/xoxotuvurakinubufim.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/91885036083.pdfIn PDF document text
    • http://changzhou.chinatupai.com/web/js/ckfinder/userfiles/files/18065453243.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/89264274876.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/jonotawemuv.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/62797330749.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_off0000cc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC14 17856 bytes
SHA-256: 8622103268579413f8c814bbec3ae7949d2a51b3facef7708ca4443e512b4e3e

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