Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b32024cf598d738…

MALICIOUS

PDF

66.5 KB Created: 2021-08-20 21:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b7d3038595bd524f455858d18cd0fe4 SHA-1: 458c6b632594c9cf9d8ab63f64217b601d99989c SHA-256: 2b32024cf598d738858042fe6aa4837ad319d6de01fe104cf9422fb4de8c51aa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, many of which point to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of these links and the overall structure strongly suggest an attempt to direct users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9059

Heuristics 6

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://newkontakt.ru/userfiles/images/file/65134016036.pdf
    • http://kiavysocina.cz/UserFiles/File/xutovilojabofokipomisu.pdf
    • https://securityguardsupply.org/php/uploads/file/69764308876.pdf
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/lovid.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e821722674b---jigedijotuf.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/dd0d126c015edf30a666e5e15ffc3d65/vosawufubojusididegilodi.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/54fccead17d64dac46ae6b6462d948a2/sazozibejurutubalebu.pdf
    • http://umrllc.com/userfiles/files/witogemizaziz.pdf
    • http://bocghebinhduong.com/media/ftp/file/9212398764.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161154af128080---83544073404.pdf
    • https://tidymoney.com/ckfinder/userfiles/files/68036323074.pdf
    • https://vivaldiroberto.com/img/files/mediafiles/file/baxumujiwejiwokazebifa.pdf
    • https://steklo-shik.ru/userfiles/file/37667171154.pdf
    • https://lecourbe.dk/userfiles/file/93679364980.pdf
    • http://screen.by/images/file/46064091809.pdf
    • http://msamerica.net/clients/873634/File/24454827063.pdf
    • http://atomiccm.com/userfiles/files/xijewegatefelavo.pdf
    • http://3q1p.com/upload/file/2107062115469608763tefvcz7j89i.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c773d726f94---17056684353.pdf
    • http://belloverde.net/emailer/file/batunegawusukazitima.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086f24ed1fe4---85130612494.pdf
    • https://culturasiapamplona.com/guiarte_userfiles/files/3615367990.pdf
    • http://oxigensupplies.com/shipinc/userfiles/files/2768828252.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/iousd3rju156bdcc82a26kcrcs/zebavunidegopirodubodadug.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16089f91aedb20---17695207073.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=express+vpn+apk+cracked+2019+free+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c4.bin
d8e098901e1010ca17648ed9795f19f0b90d9f66b0b7dfd34b60e6398bba5110		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 11216 bytes

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