Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d9b8b043672f41…

MALICIOUS

PDF

88.0 KB Created: 2021-07-01 18:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3da16cb8e5c5010d123ad70385b402c SHA-1: 0343d8c910d87b523986a20dc0c30c5509bcd5e7 SHA-256: 47d9b8b043672f41ca26f35143d910b24546c58fbbb4bba9863baeccd552fb30
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://partner-support.net/user_data/userfiles/files/14824156111.pdf
    • https://cargotavio.ru/files/file/7512780341.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/buhjhr0hqcc0t2kang93veuph2/bivonabusabi.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909a0b76afe---36829667230.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ba67b87a5---duvoze.pdf
    • http://esipro.fr/userfiles/file/51109100319.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/1rusmpro98m5mbvmpi8qsbhjtg/diwujutogiforipi.pdf
    • https://aspaeng.com/files/image/files/39820792694.pdf
    • http://xedaptheduc.net/app/webroot/uploads/files/ginitukufi.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b4f912aeb---siriwudumakisofevu.pdf
    • http://malopolskiszlakwinny.pl/upload/File/naposemo.pdf
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/85htei8alt9dpqftm9otq1f44e/37960862162.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/a61d94b396950c7d4883c05eb11f358e/pelebixovorekorap.pdf
    • http://quatanggiabao.com/images/uploads/files/vozuza.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609844929f528---direwuxapepogibezetili.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78299be1b3---2911110382.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/c7l5qp43cfqc93p444frm7e4j7/wuxojoguxaxetidukole.pdf
    • http://bichvan.vn/upload/files/58191640669.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/742178c1c4bd0f801a0baf9e38c65292/60221066109.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16075b44555141---49875342345.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/c545d4ac25eb31223944b5a236986515/filimijuwapoxaxukel.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf4e17b58bc---dokubugevadofogovi.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/8gftshirgo3i66tbatf8ohsllg/51603063995.pdf
    • https://amitadevnani.com/userfiles/file/weboro.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/4489109e2c0def33ef0562c6fe9c09fd/98406261227.pdf
    • http://cobansut.com/userfiles/file/87707361828.pdf
    • https://atraba-holding.com/userfiles/file/62579559997.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=i+find+myself+thinking+of+you+quotes
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f60a.bin
38ab470077980888a5eab9f5a21e02d92eb6d28b3b214cbe8add5e6ef56b1b56
pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 16868 bytes
font_01_sfnt_off000121a7.bin
7052dddbfb30534340895d9db410dd40fb6260a4df6d275974216358008356ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x121A7 10940 bytes
font_02_sfnt_off00013a4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4E 16792 bytes