Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2144e00d712262b…

MALICIOUS

PDF

97.3 KB Created: 2021-07-23 06:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f24667cea22310a460b0b39d8a3f4645 SHA-1: 9c34c945e890b9cedfc706e56a14235765b8a744 SHA-256: c2144e00d712262bb9489612158c70b0661cd7df422762bce1cef952e78bbbf3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous distinct hosts, many of which are likely compromised or disposable, suggesting an attempt to distribute malware or conduct phishing. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically indicates a non-clustered link farm on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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
  • 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 http://dancingstarsgreenwich.net/clients/1/10/10f73e4104fe6082999c9b722aa65ba2/File/22179381565.pdf In PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/notesidezumixagunutijej.pdfIn PDF document text
    • http://dgjst.com/upfile/file/39511056805.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/68890050951.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/75373489621.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/bagifuridilofijesi.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210614094613_paxdo6.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5af3d6a5a17f93e2601dba30a77cce01/vabedivetigan.pdfIn PDF document text
    • https://ccskin.com/geektic/files/ziboxototupetogagowobidi.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160e0b86084939---xuweruvirefop.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/5e34cve4a9msvs2r1cbo7kflv4/sotaxuz.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b6ea370d0---fitopomupobibeduvu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f03dcfd7a7b---82797522672.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/kuwewisajagejominufoxade.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160971a425d2b9---kobanesaxe.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4bcfd7c7f3---86080603679.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/sebenifubogufilek.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa1c1ebb04---22180543801.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/358d33592fbc2aac7e7330936b1aeaa3/91058968572.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/wizowesudesijom.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/25ae613315c57981f8eecc678ecd6ede/tikiwozagatusemu.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/62116212556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=boss+and+me+episode+26+subtitle+indonesiaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A7 11036 bytes
SHA-256: 902b32e37ceccf5f7bd8711de9484055cdb48173fd9f108ed8d2879afcbbd241
font_01_sfnt_off00013028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13028 17172 bytes
SHA-256: 6cb8be97e08d70085a2879860c8cff50f819313df9e9fd313588dddd8ad8aba1
font_02_sfnt_off00015d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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