Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b452d97a71227c…

MALICIOUS

PDF

74.8 KB Created: 2021-09-24 03:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9d6b0562206832f1c3f216665385b557 SHA-1: 0d79fa963424aafdb589f0afc3706c16a4aa3c6e SHA-256: 14b452d97a71227cd3e43b61df8a3a198fdb1ddab3c93d5db3c92b147a71511c
134 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external links, many pointing to PDF files on various domains, suggests a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://westpakusa.com/phpsites/vertical_living/uploads/file/mawefijepe.pdf In PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/manajirupivijuxegafugof.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/kosilado.pdfIn PDF document text
    • http://scarpatti.com/files/xarodev.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/37852980768.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/8030014295.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/78750217409.pdfIn PDF document text
    • https://5a.ro/ckfinder/userfiles/files/3057603829.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/fugogirifoxujovulod.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/pamamogenokijeruvinez.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/18799545976.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/zamoviridomiv.pdfIn PDF document text
    • http://xn--82ca1bkibi6eufn5bh1b7i3e.com/UserFiles/File/80462347982.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/kebaxera.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/ruzoviliroxovoxopalo.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/gobuk.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/051e3f529b64c213a4c159f024e06dd7/pozatepipefojafop.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/35704912680.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/43398982173.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161493dc2479cc---xufiluvofivefidufaxerel.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/69369041095.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/gemodetolape.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=pubg+mobile+unlimited+ucPDF 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_off0000c006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC006 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81D 10524 bytes
SHA-256: 72441370957fa6114d87ae954f639c5b95600f49995380e7efbfd7ce57f1f76c
font_02_sfnt_off0000efc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 17788 bytes
SHA-256: d4c886e9ecc2cfb46a1a411cf87d791879df17a445537e36c0fcce6e4debd3c5

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