Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e41d7955409d4f3…

MALICIOUS

PDF

59.7 KB Created: 2021-06-07 18:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2dba024a8caf5b30d8278c871342ace4 SHA-1: 5ca03631e2829955ddc78a93613d2a6fc62c9cc3 SHA-256: 9e41d7955409d4f3019d10b0716edfc3d10b5fa4b6fc53aad80c19799c6d5b11
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 various websites, including those hosted on compromised CMS platforms. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user interactions, common in phishing or malicious redirection schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8151

Heuristics 5

  • 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
  • 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://irlanc.ru/uplcv?utm_term=sanyo+television+dp26640+manual PDF link annotation
    • http://andlupa.com/userfiles/file/21675084892.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/d502dc42daeb2fbf7557e8b2d5f015d6/96771984985.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/70917419609.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f361594e0c---soretoxefu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/53a62d5b2ec8b01c20c8f9bf4e8d70d1/vedoroxudix.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5576a0f9a---52299480842.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b22c7c2ae---tuwedetegejog.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16078c218d7e01---tibemebafeka.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/ce6af8502ecb3b32b352f25ab1f4b428/82404699008.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b595a02a3ec---salavufibal.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/35753837875.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/63107748739.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090abbcaafa6---jitog.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/330dcc3f807657a972d56a565856886b/jogaxelazorojit.pdfIn PDF document text
    • https://loctra.net/userfiles/file/neboliwudipitovef.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607872ed9eca4---xefonofaxedozivegijogin.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/36554986377.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABC 5792 bytes
SHA-256: cd3ada9e7bae381c6af4a5aa970dd9b793ea38170f58888c8d7ee9ad45e6ea97

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