Malicious PDF — malware analysis report

Static analysis result for SHA-256 0972dcf7d58bf5a1…

MALICIOUS

PDF

81.3 KB Created: 2021-07-02 16:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 34e68550ab903205ff1c6ec220bbd849 SHA-1: 9ffe3aedebeccd2907aaced59f973e330907726e SHA-256: 0972dcf7d58bf5a1c7dad1738d14a00003ff698d90d67b958ce321c6f502c0aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to external resources. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution, by leveraging these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6dbebff27---suvojewufuzonuli.pdf In PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/41792694509.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608035ad212b9---33976548960.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4056d758c6---fujizulowupuvidewixubul.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf41bb4173e---86674866530.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/74723656479.pdfIn PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/15276639678.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076f2e8be7e3---7582625356.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/lawefetuma.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed52cc8202---38623411456.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/guxokasomunexij.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/sitizoxodepepotozikepoke.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/wixenesomazizixagigare.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41aef04541---86789227683.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/e59d1e7ad5eac5fb9df24f554e1bcd5a/ledumanipojakusapeginijat.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160875361327a2---mejujuneranunosomulaga.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/vagare.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e9f4c39ff---48348168290.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/36qp8o13900q7nm6v1r0g99o20/57068320744.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/1s05ffts8f4q2iif1052p47ob4/92613993026.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/vuetgap9p0gkg76uls1ifdemn1/49865253882.pdfIn PDF document text
    • http://aplus.to/userfiles/file/gipiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=pounds+to+indian+rupees+todayPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D6 17180 bytes
SHA-256: abab9f55d341ad74c8767f5cead8702a7901a81e30aa364dfba3b66322659922
font_01_sfnt_off0000ef61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF61 10552 bytes
SHA-256: bd67bf736277c3110667483a480053a4956ffa0e12cc132a4bbd6bcff879719a
font_02_sfnt_off000107a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB3 16300 bytes
SHA-256: cb22297cb345efa2b973a5529f7d34f362c2fa401ecec879e64cb16b1dda6a81

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