Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a6518ab29776e2…

MALICIOUS

PDF

54.4 KB Created: 2021-05-04 14:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a034d206c93ea451a58070d6536c9609 SHA-1: 28a2bfbf777b71fa40914b195eae7bae7b8a4034 SHA-256: 64a6518ab29776e2aa33ce88a7d5a98745103be252708dabd74f531f416eb7f5
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised websites hosting further PDF files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates these links are likely used for SEO poisoning to lure victims. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5822

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 https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/7a74f23b9c420f149ea2dc2c5f7786be/purila.pdf
    • http://ankaser.com/userfiles/file/31957155215.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/e6d860de2cf1ac97dca717b33e0bd337/21189986068.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bce69d6f32---99576517606.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160836060a93eb---6854010437.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1607e484f3664a---rugomolisofezatavur.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/7e84c672f9ef2c6d0ba63547e0bc4fbe/pumivo.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/80e3fbc843f7dc28798daefb54104efe/79027555957.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160742dbc50cf5---rigujigubakirik.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/e34fe6bac684e72dce1fd263b65a1260/zesewafobebibegulat.pdf
    • https://motelandratecuci.ro/userfiles/file/mujowupivapames.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/u60ailhcv5k4qd74fgl4oheg64/gugenomedes.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=vmware+esxi+6++iso+hp

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