Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea90061ac22140e…

MALICIOUS

PDF

83.2 KB Created: 2021-09-20 15:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c6efedad93f61969661514eb187b6d30 SHA-1: c930fad7ff474ead46fd9fb51327a61183e4736e SHA-256: aea90061ac22140ecb174954fa6f8e9c01ba30e6242fafe6160ec1f0ca7af894
132 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external URLs, many hosted on compromised or disposable domains. ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to redirect users to phishing sites or download further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3632

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=call+of+the+wild+movie+free+watch+online
    • https://samngaimarble.com/html_upload/file/8145136743.pdf
    • http://afghansolar.com/userfiles/file/61596881819.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16135276f6f77e---93208114366.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614774a79e713---53049907721.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2730115ab---66295539764.pdf
    • http://105chers.netsociality.com/upload/files/woweliviridukasuperubeje.pdf
    • http://khyljg.com/uploadfiles/files/83911828255.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab9fcc4a0f---rizebubexegeraxopagefo.pdf
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/3460419093.pdf
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/67264421001.pdf
    • http://kowalstwwo.pl/public/cms/images/file/wobomonimigolilupunez.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e98c707de5---wamafazojad.pdf
    • http://agro-partner.com/Image/files/47954845057.pdf
    • https://chingchia.com/uploads/files/202109110201059081.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/fcjpsmh6rudo58cv28ap0u134k/gexevovunogarisepavixe.pdf
    • http://imi.vc/upload/files/jezepuzo.pdf
    • http://marcelponjee.nl/ponjeefiles/file/kubawi.pdf
    • http://hak-al.com/resimler/files/48250600570.pdf
    • http://www.jindatunnel.com/up_files/file/19197083127.pdf
    • http://clairerolo.com/userfiles/file/58767092889.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c472394989---regarepefovogovok.pdf
    • http://nomorecpapmachine.com/userfiles/files/sofuselisigepofakimazodus.pdf
    • http://pizzeriagiganti.ro/imagini_ws/53163192893.pdf
    • https://blokhol.com/upload/files/gopur.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C6 16792 bytes
font_01_sfnt_off00010fdd.bin
3f0c067665256e903ca2174a2147964d809cf2fbd75c79c65096b1d2465507f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDD 10756 bytes

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