Malicious PDF — malware analysis report

Static analysis result for SHA-256 96697c7d18b72a5f…

MALICIOUS

PDF

65.4 KB Created: 2021-06-19 01:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15c9e257b23be79e6d45d43f831d7dc7 SHA-1: 5368b43ae5f8f8017453a491b11b840b624fed84 SHA-256: 96697c7d18b72a5f3b417db4433476b3dba435c538e7739891297033a82380d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malware. The heuristic firings indicate the presence of a link farm on disposable hosting and compromised CMS upload storage, supporting the phishing lure. ClamAV detection as 'Pdf.Phishing.Trojan' further confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9729

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 http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f116a5dc17---50357193568.pdf
    • http://lideparts.com/userfiles/file/1621175088.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609831763ffdf---kamaxisexumukelosolo.pdf
    • https://aquatrustfina.com/userfiles/file/72735944448.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/47mp5ird2it3cplprthmec6ddi/xuzatavefejepixula.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe9539a9b7---zofoti.pdf
    • http://canphantich.net/Images_upload/files/nilaluxonig.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609debe80987f---dewavezubej.pdf
    • https://altonika.pro/files/fck/file/24529229603.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/5c2b78a7321c6b80914f4ba3b2ea4f44/tupot.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/827dc132709a980735ec9688f2dc2185/83323797878.pdf
    • http://koovappadyscb.com/ckfinder/userfiles/files/fijujuridof.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed1251c7f5---28765792460.pdf
    • http://apsons.eu/files/file/xunakipukixakemujaxaz.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073649190c07---28748477011.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=no+crop+photo+editor+apk+download
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e17f.bin
dcaadd9d91a63c1999a0e705d2cc3dba007f40c77afd1ec056a7ba36bcfe2753		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE17F 5108 bytes

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