Malicious PDF — malware analysis report

Static analysis result for SHA-256 69084a0e81ca7e7b…

MALICIOUS

PDF

80.4 KB Created: 2021-10-04 11:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1972f38dddd0b497cc25e391dc78d525 SHA-1: 4c6555716a5749b0b73c272478b6aa8617351eb7 SHA-256: 69084a0e81ca7e7b6c3960f8ac21861777f2ed421d90629cdd89651fa30648c9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. The presence of numerous URLs, including those hosted on compromised CMS uploads and disposable hosting, strongly indicates a phishing or malware distribution attempt. ClamAV detection and ML classification further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6200

Heuristics 7

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://smidgel.ru/uplcv?utm_term=damian+walsh+barrister PDF link annotation
    • https://epm.jot-solutions.com/files/10235119466.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/xanapanadedobetalikibojov.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/bolomedizizejoga.pdfIn PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/bavivenufonoda.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b74dbcc9a0---11771078627.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/g33lht57bbr8mmtp8uv7m44fu6/512987079.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/5603488148.pdfIn PDF document text
    • http://colonia-hausmeister.de/uploads/files/22630474248.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/rukifujodixovoxavotefenak.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/39462817140.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/94954214071.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/zudolarukonanef.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/27280937261.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/rejiloxisovirimawu.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/fefifunivimaburagureluzel.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/41668933547.pdfIn PDF document text
    • https://kettosallampolgarsag.net/imagini_ws/mapanod.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161400ebba3886---vuvolidewefavekad.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210908230023_9g6m24.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/revezavikuvaxezujezo.pdfIn PDF document text
    • https://planbmedia.hu/files/78088311914.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/dee1d2155b9e10b212547737e4fbcd25/nebikefabemop.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109080317552922.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/21277481696.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/pupexetiwajoroweka.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000decb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 19964 bytes
SHA-256: 75aa4cc18c5f692df1bfec0d96e3657c8bbd69137a79b148004ce93f16f3ddd3
font_02_sfnt_off00012ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC5 10480 bytes
SHA-256: 3cbd22840b3ef3c7a045001e2b3810be9530366c64877e10e0dac85553e9cfbf