Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a30303a2c98a55…

MALICIOUS

PDF

72.6 KB Created: 2021-09-15 11:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b0949057fa89d6c14cbc14820b4d4bb5 SHA-1: f5dd80b6155870fa8389f7b0aff42b679715f850 SHA-256: 79a30303a2c98a5593bff66eaa20362b9fbe567f1f2fc9399fcdb172d8f2271f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated maliciousness. It contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. Embedded JavaScript streams are also present, suggesting potential for further malicious actions like downloading secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6613

Heuristics 6

  • 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.
  • 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 http://ls12368.com/userfiles/file/53537769974.pdf In PDF document text
    • http://palirna-frydek.cz/uploaded/file/lezafunowaziwu.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/sorafawuv.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/72636274451.pdfIn PDF document text
    • https://zlato-invest.cz/upload/files/80308644127.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/viketudusipagapunu.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/kijufumofasupawukidarike.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/66930767288.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/31376900366.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/loladu.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/dosizedukunapejaga.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/vulitotipuf.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/81349581696.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7a665e8cd---33822846978.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/wufezabodelitamenakenuke.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/43cfdf813e69bd1b4c35999bf70b95b6/17929174901.pdfIn PDF document text
    • https://asztromiskolc.hu/ckfinder/userfiles/files/18290326503.pdfIn PDF document text
    • http://agppi99.pretty-match.com/upload/files/12208903407.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16135e4289aedd---18771176806.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/kemut.pdfIn PDF document text
    • http://deforma.it/userfiles/files/1607727528.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16135114911c75---giwufoduxiwados.pdfIn PDF document text
    • https://themalc.org/files/file/pesaxagirevexirem.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/28937793527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=android+root+applicationPDF 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_off0000f521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF521 10188 bytes
SHA-256: b6c7ce960fdd254df63102a62e7ed1dccfcded36d26f04e51b7491f120609319

Open this report in the interactive analyzer, or submit your own file for analysis.