Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2b7dd0951588e8…

MALICIOUS

PDF

80.0 KB Created: 2021-08-31 17:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 2da209f1482aea32bdc0f8f3980cb44b SHA-1: 8d45ba394bec52354d8491ec5c6f3f566bd659e7 SHA-256: 0d2b7dd0951588e8656ca9a3b801218cc5530556bd14991dea474366fd236498
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

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://synerhu.ru/uplcv?utm_term=runescape+mining+leveling+guide PDF link annotation
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8fad72d31---91415518887.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/73041948392.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/zolunoxelowirefutaxaful.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16078f181737b7---21626288945.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/50188942824.pdfIn PDF document text
    • http://slhospital.com/upload/fckeditor/file/mofovuv.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3f795f0f8---93641548036.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077dc1760080---82687851309.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d9729b59795---zujonawufa.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/xedewin.pdfIn PDF document text
    • https://redac.ch/upload/64019656659.pdfIn PDF document text
    • http://nashcentralfalcon.com/clients/d/d5/d5bea9c86035def548a020f7371d19fe/File/6540970752.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/40027255874.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/8hgn586od6l8ajn4b92ddiqfs7/kemon.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbed8402e6---40968004321.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/63799716675.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/49ca2c0dbe91ea57527f5495b792d7bc/15720264377.pdfIn PDF document text
    • http://jafra-com.at/userfiles/file/20314164557.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d18a602d---45196773.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/88289924515.pdfIn PDF document text
    • http://melvin.cz/data/98735343105.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/8097a473b79776444a7ab8e22a68adb9/46335543553.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/5584e27050d3a54e947c272fc9e3a677/56306359301.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16082ae53a4e4e---xinusekifuwetori.pdfIn PDF document text
    • 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_off0000f90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11126 10752 bytes
SHA-256: 9fe4d38e3abd810d993a62c470306d9f356d35ff29842407fd370f777fb0a21f

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