Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3e6be205c27d5f…

MALICIOUS

PDF

105.3 KB Created: 2021-06-26 04:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c447c57958cc61f4d42b65a131b3d0a SHA-1: 816c0a1697af243036344da41468965e567a85f8 SHA-256: ba3e6be205c27d5ff583424c99d9db94670916b232c2de7d437919de2aefafe9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://rocincorporated.com/domain.com/images/dynamic_pages/file/tesutegax.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27e68ccb4a---dopimivun.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/d91562e78ffcee28ae206c89a3204a8a/7806881812.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9bab78b38---munolawekapilogevurebup.pdf
    • https://mariapolis.net/ckfinder/userfiles/files/mabadijemugifolo.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/dfaa3a76645afcb4dca9ebbf485509c7/vekulakapagux.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/2c540f5b63a3ae8b7b5e3955133477b7/nawad.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/8a61a2a2202c81d51a0bb08da2c4a556/bavawivez.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c75412b6f0470060691d98d3d7a579a0/fexixozewepudosu.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/9v4uad4lqm65lfpcjcqhpbor13/vavebozik.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2708602c7---74910656289.pdf
    • http://parzenica-bialka.pl/userfiles/files/82067040028.pdf
    • http://medica-eg.com/userfiles/file/bodivegisuderi.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160881aa49eb54---gixenukurakazakaxuzumobap.pdf
    • https://fcksa.com/ckfinder/userfiles/files/zoxodipeboj.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/1ptb8lj7mqg37sennc2bsu2if5/13020251621.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/70babb96b54893746dc300ceb99dc583/jitotelemako.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/3ca74e0c06a8f4c71720b7140973a334/9115831412.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/7aakmiu6tuk86tdue4p6qif9h8/87105789726.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfced60c308---dizexikebinaj.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/cadbb144ac966fcf8a26c1dc703d8cbf/bokowelewifonisawok.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073fbef43240---37374523050.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/3c6ab3f3d4a1299e0ed508cc449fe031/72246651292.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=miss+universe+2019+top+5+question+and+answer
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011054.bin
5e7e363415851f3118b467dea9fb8d9f8f3081b7f6c0ec888e8036de1c220c0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11054 11328 bytes
font_01_sfnt_off00012b10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B10 16792 bytes
font_02_sfnt_off00014321.bin
36e8f822abe8bfc46cc5cedd4956d3fadabac02e71a03c7e89ee546458ab4cb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14321 17608 bytes
font_03_sfnt_off00015e06.bin
a368a8796eba91bb08b99c42223345c20ef1b11073bbb96b58692333b7fb7ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E06 26344 bytes

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