Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89e6400ea725423…

MALICIOUS

PDF

63.7 KB Created: 2021-07-28 00:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4bea9f80f67aa127f41b507077b2be72 SHA-1: 67e5fe43b06deb61d77183731fb53189bd3c6f70 SHA-256: d89e6400ea725423b2b8b97fa9e223d4fafe54135e238690e547803b4c2ca124
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous embedded URLs pointing to various domains, some of which appear to be hosted on compromised CMS uploads. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9574

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
  • 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://beliangka.com/contents//files/mijifafifalegedofadew.pdf In PDF document text
    • http://bidhichand.org/sahodyatarntaran/userfiles/file/sudoforezuzusakujut.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/etm1bklih8ea5lpdluhd7rfca3/sogojefawibogonafija.pdfIn PDF document text
    • https://miet.hu/kepek/2409016885.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/72101871768.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607084a5e1e90---24950545879.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/71375106328.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b316bb8fd79---wesavegezexasopisujukeji.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/josuxijaf.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/ebd0bdb6245c54ce46174cf1f469ce47/67251501674.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/68037835283.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/7314d53090c933d683df96487a840c00/40695253991.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160944c9405281---guduluzax.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/kikekaz.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/73376468740.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/f888f63b6d20192579b65f16b36784a8/74807842441.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/delugunubuvim.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a566d9961---62947252711.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/81988701132.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/685d82e9934446158527f580559fea71/78963383278.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/9491611391.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=youtube+video+downloader+mac+freePDF 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_off0000d75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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