Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bd089557b136bf…

MALICIOUS

PDF

85.8 KB Created: 2021-09-15 09:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3098cfb290dec7f6cebc8ecb6ae6a77a SHA-1: 365e9792a7cfa698728af4ba096a213e052b665a SHA-256: 69bd089557b136bf20b77a17bb18d57de8a3e9d89f0064c51b2734d491a18911
156 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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
  • 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://ipcmanpower.com/admin/style/images/userfiles/file/sugezuluberuvadof.pdf In PDF document text
    • http://fmmvn.net/userfiles/files/14356496263.pdfIn PDF document text
    • http://grafitym.kz/files/file/jaregipulapuje.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/87731533052.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/bajezaredezasugo.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/8d149107a9cee6451985d134a8cfb887/90818037063.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/gewod.pdfIn PDF document text
    • http://synphabase.ch/upload/file/lanifisinowezug.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/23636990353.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/15611821675.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/t1gshvm08dhiv358uuat5h4ohl/sadumufavezifupib.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614094bf514e9---pekazutefezowuz.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d8ddf0d12---xoxetupotigine.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/69fcad9c3f8828b155ba143cb981e382/87632235924.pdfIn PDF document text
    • http://bushurov.ru/images/files/63382229783.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/zetaw.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/pivipafax.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/midaborowetepop.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/95993244688.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/vuwipelita.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/36494632499.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/nujimibawodi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+send+mp3+on+messenger+androidPDF 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_off0000ea0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 18096 bytes
SHA-256: 60647e75432e166c6e2e2bfcf3c83d1c682899723c8fa07b0e30ffa329b78efd
font_01_sfnt_off000118ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AC 10936 bytes
SHA-256: 03f8a6b191d3fff9419d48f5067fd412774fdcfbef351e9bedd43fb04212dd22
font_02_sfnt_off000131d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1