Malicious PDF — malware analysis report

Static analysis result for SHA-256 55364159360015db…

MALICIOUS

PDF

200.9 KB Created: 2021-06-27 04:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01877292f9876aa37a9a2e560ce70a2c SHA-1: 139c200cdc1dec15137c1709022996a52cfc53d8 SHA-256: 55364159360015db53a0f1965c17c4130768e3785cbf5714e1b8047dd0dbf613
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content. The PDF structure and embedded links are consistent with phishing lures designed to trick users into downloading malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9034

Heuristics 5

  • 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.
  • 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://ystechpro.com/nbloom/fckuploads/file/vokuxigemekogu.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c94f8ee74d4---wewogizijumatil.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/imaeb5rik6nikqmh4c2bd8vbl0/nifebuzepefovejivave.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-13/20210513155010612742.pdf
    • http://haniltm.kr/upfiles/editor/files/mawaborodadivozutafiwoz.pdf
    • https://deltagroup.bg/uploads/file/resul.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9747648722---79789619146.pdf
    • http://tunglamgarden.com/images/fck/file/vojaxaxojarolirumetubizes.pdf
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/54150268097.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d18ab4a38b---72976685300.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad75c6ca822---dosisaka.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bd833f955---39453369249.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/2bd3555473033389607eee7e736234b8/komojetokolejugisibideme.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a444fb851aa---nifoxuralerunapifexixiva.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210618135115.pdf
    • http://asiavent.com/UserFiles/file///ditonusededulojigo.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/tn3d8uc4lc0mnk2hgocga1ajak/pikesirefa.pdf
    • https://ludifrance.fr/userfiles/file/vuvopukewemabatumeni.pdf
    • http://files.ibiza-ferien.de/file/24148138494.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab62d0f331b---29212168497.pdf
    • https://wietsevoermans.nl/ckfinder/userfiles/files/wejenebumofenovodemib.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607271ef3b038---pezosix.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf7799d3bf---27086553971.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=political+motive+for+imperialism
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00029fa9.bin
785984c8e8d4ee1692dea86c63435024ec7fb100d4959ca99c8645048742b771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29FA9 23896 bytes
font_01_sfnt_off0002daac.bin
9d26c4f25f65398927261159d54c9cc11e4ef96d875bda99e571b99e662d88a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAAC 10604 bytes
font_02_sfnt_off0002f2f4.bin
9ef01a1898d1b2f759e6c90ebdd846717b8cd2ce6e56b2ef6ccf4a98bd5c94f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2F4 2332 bytes
font_03_sfnt_off0002fd0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD0A 16792 bytes

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