Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38197c6fa08fd3c…

MALICIOUS

PDF

94.8 KB Created: 2021-09-12 08:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f65e85c216fcb3ce6c6df7c3f8461a6a SHA-1: 75fb91c048b530feb645a7b36a451cfcb16c9844 SHA-256: e38197c6fa08fd3c89d7f4a79ddd91bbc67439206508d8dda1f77bee8d5e80ae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure 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 0.9923

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://philabc.ru/uplcv?utm_term=nettv+live+apk PDF link annotation
    • https://zenithservicos.com/userfiles/files/10028111981.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/93597434410.pdfIn PDF document text
    • http://glassick.com/userfiles/file/litixuzidegijexuxumadadi.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16137fbdec85ad---11697962332.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/94748209218.pdfIn PDF document text
    • https://senegal4d.com/contents/files/10028135297.pdfIn PDF document text
    • http://jmyhship.com/uploadfile/files/vesewofuzilidijoluxe.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/cb2e1820c3c3aa7379a254e06d685331/85575338735.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/37461474177.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613263b4b00e3---vafuwerowanevesabutamo.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/femebifa.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/58768312544.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c276710bcf---94953389190.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/32005596541.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/binexonu.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/68891598345.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11396653278.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/dapiputukabilugorunipagap.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16136c2961b54a---45623221480.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d74779a404---dafobifivetezuvegodiruk.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161335dc1f1a28---sikakom.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/56113220149.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133254ab0504---dekumemamimasawugajuwixo.pdfIn PDF document text
    • https://otterdisplay.com/userfiles/file/miwevina.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bc20af5ec---1480226542.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED58 22972 bytes
SHA-256: af9f577f59310baf8a204e982fbdfe62f47578a874c94417d5fb8c851c34de70
font_01_sfnt_off000128f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F1 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684
font_02_sfnt_off00013eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000156e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156E0 9888 bytes
SHA-256: 36fdf3c6609343ad73fa981d8d40d4a73a15f3d14cbeed0c1a4c0f6080b76227

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