Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b3ce20c6637aaf…

MALICIOUS

PDF

78.1 KB Created: 2021-08-04 05:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e7cf465658ebc31e490f385cf532945c SHA-1: 37118662ea35a9ebb4d9c9f2fc613159ea9aac72 SHA-256: f6b3ce20c6637aaf1a89769c49e0834cb23ddb0b6ab953218f4fb669f93ef520
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious files or redirect users to phishing pages. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7431

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://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/28e031caccece3515c9d3788ddd6b4ba/safixawilemefutuxod.pdf In PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/32401941585.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d669efcf57f59ffe38cbdaeb0489c357/7355501275.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/40721137440.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4c97ac885a---96049582409.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/omjf7rdu3gjjcd4dlebfcjv725/lenuzupenarumadejata.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a408ad9561---16083671605.pdfIn PDF document text
    • https://ms02bet.com/contents//files/91820473309.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d864712a04b---3577288647.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/46520352624.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b812ebc58a5---4976350649.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/13553299319.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c263c855a---mavuwepo.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/13696763833.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/pipakimutagejirijisumo.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/vogatewazususogugi.pdfIn PDF document text
    • http://sciattella.net/images/file/98615213600.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/40117454882.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0e726e573---tirukiletojozitolep.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/06/03/kewiminokimazo.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/jukabo.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/b64a41d8a4a5118850fa4c4a0f6a0f5c/wodokidenezafozaj.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/vikuvodixujunawilipaxemo.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/74769467923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=download+gta+san+andreas+v1+05PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 10792 bytes
SHA-256: 99a4dd84657e04dc2f235afe1f029770d785dbd6bf4c50e45fcd392fbf8c0224
font_01_sfnt_off00010c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1