Malicious PDF — malware analysis report

Static analysis result for SHA-256 d967d9f4781765c6…

MALICIOUS

PDF

91.4 KB Created: 2021-09-02 19:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: da723aa8f540e808afe9c364e26051a1 SHA-1: 8aaab602dc2bc49eabf5e1a8d044f2d84f846536 SHA-256: d967d9f4781765c6a193ab28fc24a7e55b2d31b3360890bc0b560deb6a763d17
156 Risk Score

Malware Insights

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

The PDF contains a link farm, directing users to multiple domains, some of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or deliver further malware. No scripts were extracted, and the document body was unreadable binary data, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://helloslow.com/data/userfiles/files/76206773475.pdf In PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/f8c876a7ba06ab4ff5c1984eab3ffe61/mupoxoxevowelekunod.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/185810290.pdfIn PDF document text
    • http://termitecontrolservicebd.com/ck/upload/files/14263243103.pdfIn PDF document text
    • https://noddy.nu/images/file/72378764448.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f2148cc1c95---554974448.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/311947102.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/28b5f1a1d04641513438c33eb65233df/tebawidotaxalurobuzoxapu.pdfIn PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/tufubapagimudubaf.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f8c96f721e9---musipufakadadob.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/74646718ddcae854a6c919b1a04ac08a/53056905463.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/6ec0444e6b10c1c66a4e95d5d5b89b47/ligonizutaz.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16093caf28139d---tajuwekededepomopezunowi.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/kijofosunasijuwejiser.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/pagozuvivej.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/xunujemonimapibugadute.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/gajegufu.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/gifogipositupefama.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e078446ff9---98858021616.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/53106903050.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fd6394ac9---kulati.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/94324235869.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/unsikdkstfs68dtfs9miog126u/lebukinimaravuzaruvuz.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/77925289729.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/36370333071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=orlistate+bula+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_off0000fc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11445 10532 bytes
SHA-256: c9e08c283b50e19f8be1f8412f02c959299cbe60dc6fd28b70744b2356be0b5e
font_02_sfnt_off00012c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C37 19772 bytes
SHA-256: 1cee1339afb74f41e0a83d951bed4e7d82ae1bb000e55fa91a9647d080a7143d

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