Malicious PDF — malware analysis report

Static analysis result for SHA-256 e202956a7714ec27…

MALICIOUS

PDF

63.0 KB Created: 2021-05-16 04:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43d70d31b1ddcbea7459daf617e13a27 SHA-1: fc597cef99ad089ee51786d96ff31b2deee02531 SHA-256: e202956a7714ec27061b6205307337dc2aba9ccbedba05149ba9621b73a9e252
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9745

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.
  • 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
  • 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://bfr-bialapodlaska.pl/userfiles/file/sunolemefixiwunipemi.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e969dc3de4---gemilabomarud.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/b2ec231111962fa4da9a862ef1f63047/75549556085.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744962d2be4---23705927269.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a059bf264b---sukomalukez.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/bba43a2ea67e9038e55a06105ca32076/zigeniji.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739f76377bc---20541944431.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac8b06867---jatobafadufekosojalikaviw.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086204d3871c---balibojefotir.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/6mj9rl70a1cjcntntqg5lr9lcq/zevuj.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f07778a371---64904195794.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16074b3764bdd0---ranovirijufudefulose.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076cee48becc---pafuwos.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f94950e2a6ab5ffaa3f3c1f0a37091a9/61988560576.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/5e46af43577a40b5e69e8ed597e7ef7c/pasujukan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=cisco+jabber++free
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ee.bin
2296b07334c2823953313e56a5c99369dd9c94b24e97b58d516ec67df92bb0e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EE 4964 bytes

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