Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bea184d7a0a8231…

MALICIOUS

PDF

84.2 KB Created: 2021-09-18 00:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5a4bba1f0efba5a9a951d618896efe38 SHA-1: 98b2636d5b1f70b0580e020405a0f60194ae7a4b SHA-256: 9bea184d7a0a823162c8c7dd1b1b32926b84fd89f8ab72c7d3f1af80c9add20f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://irlanc.ru/uplcv?utm_term=watch+dogs+2+mod+apk+download PDF link annotation
    • https://bonekarusa.com/contents/files/78996657591.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/pfco7udlc3h23ktp18ne36aol4/98249159677.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34921255217.pdfIn PDF document text
    • https://cosmopolitanhotel.lastrada.bg/uploads/wysiwyg/files/29643431961.pdfIn PDF document text
    • http://madinaboys.com/easydo%20v2.00/files/uploads/48672797189.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/rizuvinifidawitek.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7075680a2---4748982064.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/dasel.pdfIn PDF document text
    • http://willajarmar.pl/userfiles/file/fanubupifimexivepedejo.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a8d4c5a0d---87182767780.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/batalupebibefiwojiv.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/fugof.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/1411512820.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/bgfgsj8qsihvbivdr4f2mteeh0/68195901578.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/wibunilamilokurewaxo.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/tiwomapulibo.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/dd8c9a8820aa605de98982b534e80a8c/9669954099.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/25445620634.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/wulajubufoxetufirojimokap.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/posumolexexigorob.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/75285664377.pdfIn PDF document text
    • http://jawarakreasi.com/file/fomofagate.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/43805350213.pdfIn PDF document text
    • 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_off0000e3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBED 10928 bytes
SHA-256: f16162452d5a66d317e5abca9181401c4268b62b948e7112fbda83030d505362
font_02_sfnt_off00011500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11500 17600 bytes
SHA-256: 8fec6ada35816f73e03a1bbb855731f8cc25c187ddbbd54342d53311c5acae54