Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe01660e011cc32…

MALICIOUS

PDF

83.7 KB Created: 2021-08-11 03:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4963862234e33d00befbcbd8214ec075 SHA-1: d4fe2de724398fcc6ca8d6c4c6054bc15896dc3d SHA-256: ffe01660e011cc329789b9f2678bb2e9113b278f8b8a22392bd1f84f85d3ecef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://langumeistras.lt/i/File/tetan.pdf In PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16105c3a119143---lupaxutugafamam.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/nupebir.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/30891298786.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/mi60p1b6r1o8dtmsk6lt05es88/30244580554.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/dufadumatalafupola.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/66541924444.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/zurilanezuvesitosarudom.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081b62e15fb2---73531907999.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/jekerone.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/aa958e6ecdaeca7a9f168b3ff8b914d2/kumeza.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/1586270201.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160ad294c7e549---xopudile.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080eb881b2b8---11426451374.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e498e47edf---sapivaxovelin.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/duwijixuwus.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/xetowowalidaxizareno.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/4124702133.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/13958742320.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efea82fec7---dabasenejigikujegeku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=sworn+affidavit+form+template+irelandPDF 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_off0000e4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCD 10716 bytes
SHA-256: 05a2c91438eee1c3dd9ff486ffaafe81264f32aeef0987e38b0266a387fa32da
font_02_sfnt_off00011568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11568 16808 bytes
SHA-256: 8ca4ca397ce612874e4192ee70f9f4deefdb76e8eb7f8e5227d93929960da7b4

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