Malicious PDF — malware analysis report

Static analysis result for SHA-256 1264667162a0f034…

MALICIOUS

PDF

89.8 KB Created: 2021-06-26 01:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad6e26752a4037d33dadefc4262b2220 SHA-1: d9d34d4fb739f32358a4e57c9a6032723ee809d4 SHA-256: 1264667162a0f0346001705a2538ce1d2a30960c1292435be2d857f66134fa8c
204 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics, specifically a 'Browser Install Lure', to trick users into downloading a malicious file. The document contains numerous links to compromised CMS uploads and disposable hosting, suggesting a link farm designed to host and distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//gosofenato.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c0bf1b811---xojajelinoboze.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e1b82bbfddc03f597323b89275f96738/49753563254.pdf
    • http://446888.top/userfiles/file/63079041353.pdf
    • http://fdscience.com/UPFILE/userfiles/files/doworugokifafozejusa.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608409155735f---silib.pdf
    • http://szkolka-wiercioch.pl/files/file/soxewugoze.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a1b81456b---77862678441.pdf
    • http://zonweringnederland.com/ckfinder/userfiles/files/buxub.pdf
    • http://xiaohecollege.com/d/files/29434128693.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085277838aa7---zexebawapejilas.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/f2d53edd40e9409c93b3df65ab56c7eb/42476509745.pdf
    • http://tvoirostov.ru/ckfinder/userfiles/files/mizipogi.pdf
    • http://dajuicebarus.com/uploads/files/fudumekas.pdf
    • http://www.aportecnica.com/imagenes/editor/file/nedututamabeta.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/5b1c347d1e808be2d506276572e16ae9/fezetebewizax.pdf
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/85605449622.pdf
    • https://sayurmateng.com/contents//files/52850380586.pdf
    • http://beijingbeat.com/contents//files/relimerika.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b83f4690e7f---tozokaxixutor.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c1ce2ab7a---85188374129.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a19de61f048---bifewosalire.pdf
    • http://faxik.ru/ckfinder/userfiles/files/53397245219.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=yts+search+engine
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc8d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8D 16792 bytes
font_01_sfnt_off000114a4.bin
f15bad2b06816daa5469659c7d8b6e3645275a234dd72a905fe0da60b071e955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114A4 10324 bytes
font_02_sfnt_off00012be5.bin
ecff891a61b418faa8bcaf9a3a9f7ce543687880792eb757f3574f2706fe0f6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE5 17756 bytes

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