Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e007bd8b254a5be…

MALICIOUS

PDF

87.4 KB Created: 2021-07-06 01:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 84d2bacad94fa8096496e33f0ea620a7 SHA-1: 33f3fe11ab7120340961a7d24e1d4f83eb7694e4 SHA-256: 3e007bd8b254a5bed39381f3db19625cedaa5054e2732691961ee913bbbcaafc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9952

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://malbreil.com/userfiles/file/jejegitazer.pdf In PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba779cee92e---rofepujamozi.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/hllknepgl7kqbp1vbsivi7rkm2/xatunamivemetufezuw.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afde1d1b6b4---dabejetipewitagilefusiv.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/zafesaxi.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/7969b0f98486c8726df56d24daa6851c/98215208293.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5ea23de6b---34917882578.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16092ebd287cae---nexafikadatelu.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/8e7aa44738fcd98d2f91ea73b27f69e5/51092550129.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/6e29843552a280de5fad195bce7187a2/zijudawuxovubovenozo.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/welevad.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/66783691654.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1608986f94a57f---talozorupaletomomur.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/razumetadotononukebipo.pdfIn PDF document text
    • https://arabacioyunlar.com/calisma2/files/uploads/37054234357.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/tobobinerewolov.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/joxapivenanopotaw.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da32f96d36---11323726333.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160808707ea032---63988558304.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4354309c2---27711495998.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/24438014058.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/c0fa2deb3e649238f203eacc3aab85d7/26094536054.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/76564847501.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=syntax+a+generative+introduction+andrew+carnie+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 20220 bytes
SHA-256: 80b78ce0c6c122beafb0848d82d28e2c808da4e4e38026f94ac142c669c0e446
font_01_sfnt_off00011de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE8 11124 bytes
SHA-256: fe660d9690d72bd137ae89ab03854b676e694b6ac87ef754c21113ebd2399377
font_02_sfnt_off000137f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1