Malicious PDF — malware analysis report

Static analysis result for SHA-256 9becbc66b8e5c136…

MALICIOUS

PDF

89.0 KB Created: 2021-07-01 23:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b552f6a10524b6052b7eb665b7c044cd SHA-1: 35e8f6494cafa6eb5d7eb0cf11c1fe7ee9d6c6cb SHA-256: 9becbc66b8e5c136e1f5a4f96f64fa7a20628f98fcb6bd642e93c406d06bfc38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories, indicating a link farm designed to lead users to malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest a phishing or malware distribution intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://stacjaregeneracja.pl/userfiles/file/migawolexiwipemogubodi.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/57e59f6c4ac0a0c88abd693163a72966/zaboxixozusal.pdf
    • http://rayanchem.com/d/files/zitiputuge.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160aba8ae11dd4---89818597332.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc9ca922d---21139914767.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/1f6eupl4riro41jhopebtt2im2/xagawabexeduwuguzafuv.pdf
    • https://nakipoglugroup.com/upload/ckfinder/files/33470295146.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3a2bced95---96829286404.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077512978a07---puregazu.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95f1f62a01---poxusufilebe.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/546777c27ce45c3d3e65cb01d98dce69/4767241012.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b112bb1fe60---47362334951.pdf
    • http://njuhome.pl/ckfinder/userfiles/files/gefokujedudezilup.pdf
    • http://ucity69.com/clients/861769/File/sabiwifeniremagowobul.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc06cb520bf---40645399713.pdf
    • http://clear-es.net/yamituki-n/uploads/files/58516832968.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/0e07030e730a45be6b513fa0a3b977f7/butugubunufekol.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/u1fd767b2jb0s8pm55gr63kkgi/15836564717.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a012bb0cff8eec396ff02848caac1bb4/54989676833.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/c75f1a9c4f60e4f7769f37b71a56a952/90760075759.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e210c0618b---wowepaj.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/e929d5ad0b85121795b1eedd119cb47c/kutukuwifi.pdf
    • http://novichiha.ru/pic/file/16899192379.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=maths+worksheets+for+class+8+rational+numbers+pdf
    • 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_off0000f1fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 16792 bytes
font_01_sfnt_off00010a0d.bin
4355f6351c87d22490e8a9338022901fe1d35b509c75a4fd3ee62334e07508ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0D 19280 bytes
font_02_sfnt_off00013bcb.bin
926c003d42cca7fc0870fbb304445c7208f75fbf0de977358c130a9375038a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCB 11504 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.