Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd214a17529b33b2…

MALICIOUS

PDF

87.4 KB Created: 2021-06-10 05:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e4f98a606a2459c9879b957b7f6320a5 SHA-1: 816bb7a48685ac88b2d3c99fac6738ce87bc3c70 SHA-256: bd214a17529b33b2e82d53babac52676f23b83e2bc9470dad265da5991ffc544
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous links to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms points towards an attack pattern focused on luring victims to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9239

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://philabc.ru/uplcv?utm_term=uncharted+ps2+iso PDF link annotation
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/vil1uubnsrsv0d622h62ajuq91/87113568844.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/71086308782.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/nuxumikijuwiz.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/cbca84e84ca102bf6ad4db82183a3f3b/36047626167.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/88652c818df46d6e37478d9b6600d4e5/92087473017.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160790bd397a05---84827984410.pdfIn PDF document text
    • http://vejwun.cz/images/93023022528.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/wufewesamokataneke.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/fobuvasonifomamalit.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/64464751869.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c8e35a6ab0424eb761558404f878385c/8022067007.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b802c6b6b06---kaxavowepu.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/d05131b81db8d9f01f807e0e88b3b626/dibadovalupugefad.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cb38bdf2d---jexer.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830ae069f39---tilogubibenirubalomavowud.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869af2ad9cf---87837870917.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1E 3592 bytes
SHA-256: df7a52de882ebf00e11b212ba445340d6e2485e1ff55df182c4d0246986cf81e
font_01_sfnt_off000117eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EB 5040 bytes
SHA-256: a8602bab4169cc85c2ae14c237713dd15006a7447547e977aa8eb9d13fb35cbe
font_02_sfnt_off000128f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F4 21900 bytes
SHA-256: 7b9edc02a61a18335d2e019381db8c5f731550944109584c4208bb933d08c28a

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