Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ed5c06d71fd759…

MALICIOUS

PDF

77.6 KB Created: 2021-09-07 16:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c7f5bbbfee5227bc8ed7a2852c5b664b SHA-1: ee059affcf2eb5257507029ac1eea3f23d084e25 SHA-256: b9ed5c06d71fd7592ac48c05cd6e585aa554e00c32e2afbaba262c0f406c627d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to multiple compromised WordPress upload directories and other disposable hosting sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users into downloading further malware. The file's structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7269

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 https://dusunceokulu.net/resimler/files/47592079186.pdf In PDF document text
    • http://spreewaldatelier.de/img/editor/file/zetelewoweto.pdfIn PDF document text
    • http://mfcpavpos.ru/file/3705078165.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3d86eb308---90099865340.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888889a7c5e---buvusitodejovudijej.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160852cdfabf3e---1809269394.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/50540293878.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/zuxeguxazuzufoba.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/4e9a1b5fe27becb49e6bdc665d5c3ed2/nejudevujabalawadod.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/ronavezuredipurofoxerov.pdfIn PDF document text
    • http://naucseto.cz/storage/43464862890.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/lebefifebevegusugez.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/34856192222.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/50650672049.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/bisuravibudise.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16126a726de60e---3076375947.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160c417a7104a4---33324558246.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4db674613---73458810776.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/i5ldcd8q51haiq75mcamrnr5t4/xularididetug.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/hh0lirbcgsb1pn3jn8mmia8m8s/vefetibape.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091d222cbee5---parowomunin.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/kijutalafasojanemabupe.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/b903868089da1bb30ef0f8dde0ecc2db/83552612440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=eneide+pdf+prosaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21C 18612 bytes
SHA-256: e5cd39151a11551cde687307d0de9ba07132876f04304e9415858c8b98347f60
font_01_sfnt_off0001226a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226A 10328 bytes
SHA-256: 87e239deeb05ab33234e7538a40e7530f6c115726561a16d4ba08ad06430f6dd