Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae7875e308c8db7…

MALICIOUS

PDF

202.9 KB Created: 2021-06-23 07:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3fdf066ac27a4d06cf86a092bd07af92 SHA-1: 747b1a1bd3414f48b61cd955d45e7e166d78dbcc SHA-256: bae7875e308c8db78efb7ca8af0310ac9b770994f11a38ded2cce7c284d474b3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 5

  • 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.
  • 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://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a4e194d23---97652787206.pdf In PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607f30c032b3f---debijiz.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/aa0e119512b59bbe2f4bbf9a0edb7464/nuxeveza.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ced0d6fd7---nukopazes.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/debemeledamizeribeju.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/62813094564.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/da6e98e738399aad063758c1098a2d9d/doduziso.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/banipunodagusamosi.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a4f74453---fetomuxugenadufizetali.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e456081f30---46746951022.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/00e874adfe19a715327a29ccf92ab1c9/8409287529.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab690d80ff6---fetatawixibokepafiledo.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b47ada4fb14---84388740874.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/bimafasejibovivifap.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=general+chemistry+module+pdfPDF 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0002fe04.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FE04 18836 bytes
SHA-256: 65f73e68e4f8fa6e2fa294d1626648e5ef9ec9db676eecc41498d2ae3c0fe3b4
font_00_sfnt_off0002a6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A6C2 6292 bytes
SHA-256: cc09cdcb670bfdb55991ef0a3aba4bc843e03c007e623c6f6d55fcd822c5e900
font_01_sfnt_off0002b85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B85D 5528 bytes
SHA-256: d10a251184539f55352f86edb4419ccfaf3937b8267188926efad52e5d949b94
font_02_sfnt_off0002cb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB01 2072 bytes
SHA-256: e88f4e5474ea269d0de65bd30e4431d3964acbaceb93a65e6d560b06c23e56fa
font_03_sfnt_off0002d3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3F6 12284 bytes
SHA-256: cc042a27e2a53089b4ca6ffcfdb5f5f33ac60e1d1cb55d2c0f4847ac32955047