Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5ee02ede715971…

MALICIOUS

PDF

78.3 KB Created: 2021-09-20 03:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c8ec5f59927fae5ce40b7159a301bc36 SHA-1: c790cb42d66ce0c0c3bc7536a35a0b075c53e437 SHA-256: ba5ee02ede715971f5fa9abb6b53b0da1beb54d52c0ec08922a1c871cf0d0bcd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded JavaScript stream suggests the PDF is designed to execute code, likely to download or redirect the user to malicious content. The numerous external URIs, many pointing to PDF files on potentially disposable hosting, further support a phishing or scam-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://projecthouse.bg/uploads/CKfinder/files/48932962290.pdf In PDF document text
    • http://gmkms.net/upfile_editor/2021/files/48712087143.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/48768b0074a1ef170691d42f036369b5/wijejebofetulivim.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/xutazomekirutijifogekuzup.pdfIn PDF document text
    • https://viktorina.ledoritulys.lt/files/veratuzozi.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/seguzofelatezixupo.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/21e52f3d31910f33894a708124db2520/34572977647.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/mugabur.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/sozef.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/dumibogopalov.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/gebiwagebulugifu.pdfIn PDF document text
    • https://raljob.com/userfiles/file/13019691660.pdfIn PDF document text
    • http://rhondachem.com/d/files/53077731581.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/tojuxoriromolemar.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/tofedeko.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/defarukoledofuluj.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/210913095246911138alwfmh.pdfIn PDF document text
    • http://sportservistocik.cz/UserFiles/File/78404682169.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/tawikalowijek.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/40538245425.pdfIn PDF document text
    • http://cleversystems.ru/userfiles/file/42455041577.pdfIn PDF document text
    • https://micsys.in/userfiles/file/mipogaxazopixexuv.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/85799832430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=dream+league+soccer+2021+offline+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000ce57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE57 16704 bytes
SHA-256: bfad4490e474a3a55bc56c1cfc38c34ae197a55df9698d9c8f8a8795c6439287
font_01_sfnt_off0000f99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99A 11200 bytes
SHA-256: ce428a695aa672fb19841fa330fd4f85beb3bb1e19a3e4f1b37c33394ce6e5b5
font_02_sfnt_off000113bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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