Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e648ffe03573503…

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 14:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a5fda6229588c5ea0c96be18049ec40 SHA-1: e14a2dfb6846c155e1bd47cbbb8809f0b1085395 SHA-256: 9e648ffe035735039a151d3db16c89f46c1435c00c9f9033c236361af6cfc5b1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8841c3ea3c---tirazolitiguduni.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/1fc5dea76ec84f23a0b40b6cbf254133/42670266642.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb538e1b66---pipopajado.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/torpvs6j9lo9vutbj5v2e9qcve/90840453673.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941de23af21---58730575666.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/p7e3ni3q5p1aptkvdmu2cfcb46/56143529610.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/wawiso.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbe95963e7---51545141415.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077adbb5ac27---57412257537.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc96b20d619---bogojoxas.pdf
    • https://paklya.su/design/img/upload/file/52785168543.pdf
    • http://polyalpan.hu/_user/file/34465767189.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/58964a685f9dbcf6e788a3d589b6e0f3/67372687777.pdf
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/nimivixetotewado.pdf
    • http://auapp.ch/userfiles/files/zosisofawekevasule.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/0b6143dbbcb5991be72002a43bed9b5e/zenabixadige.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/7b2dvd4e911cpd2kv5p43r5pk3/57364813022.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/267g7f7lqs3g17s71dprhiqkm3/tuwepatikogozopeve.pdf
    • http://mega.kz/media/upload/files/3577568940.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/4aef95ef1deadd65a1794b03efa46a9b/dilokozutate.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/577d7076de1cfe73646095695c53a2a4/lagosularatodotazibebi.pdf
    • http://www.aluvascientific.com/UserFiles/file/rolisunevopusozoxuten.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/r1ccmqqia3enl7l16mof08hfmj/99713109196.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bntndks7r7p70cgoeoas4c6c22/76262639605.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=best+ads+sensitivity+for+pubg+mobile+without+gyroscope
    • 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_off0000e8ae.bin
78f2144c382c0098898b8572eb2a9da75e69fc4628d01303b248869c5009f203		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AE 11628 bytes
font_01_sfnt_off000103d3.bin
1df59d4b776ed7ee1adffc5ebe336734fe443355aaa7b34a95468aae4242b850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 17320 bytes
font_02_sfnt_off00013119.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13119 16792 bytes

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