Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc0df8925a3cadd…

MALICIOUS

PDF

72.2 KB Created: 2021-09-20 21:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: caef3f5b144472dafa239e14334c4900 SHA-1: 194b56ff3931d0428e7f8790241217c567390a99 SHA-256: 2fc0df8925a3caddb7af4e53482df30796602e03dd9102ba3de08e35284fa4f1
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d8790d7c409f19a6de5ca1c2a0d6a596/1525797298.pdf
    • http://89928386.com/uploads/files/202109100438079815.pdf
    • http://rc-saty.cz/gais/image/file/94287747160.pdf
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/80836565474.pdf
    • http://ambvetfanini.eu/userfiles/files/64258274475.pdf
    • https://hamayeshniroo.com/shop/file/36709802672.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161439c4e8b6bd---97542101294.pdf
    • http://p-jtech.com/userData/board/file/kabalasekipasopemupidogo.pdf
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/25065964792.pdf
    • http://xn--or3bo5mvlb.com/data/editor/file/firilofimoziba.pdf
    • http://centonze-vini.com/userfiles/files/tikugodowexurekejukupula.pdf
    • http://webinaris.net/ckfinder/userfiles/publics/files/fibeposelefurez.pdf
    • https://hotel-la-licorne.fr/userfiles/file/wisarakamoloduxipozed.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614110ee17091---roxuk.pdf
    • https://keralahappyjourney.com/ckfinder/userfiles/files/39765498056.pdf
    • http://falconartistmanagement.com/ckfinder/userfiles/files/24694802045.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/ae0226e19ad017777bd7fe0b176ed6c1/10495150201.pdf
    • https://plagij.at/ckfinder/userfiles/files/15234445222.pdf
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/komuwiwebujaje.pdf
    • https://globalathena.com/ckfinder/userfiles/files/rorif.pdf
    • http://purel-biopharm.com/upload/files/jifosoj.pdf
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/rojunujinozizowifo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=super+mario+world+snes+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5f3.bin
31a84033c428ee95067c82da7f6a43b64eaa202f77fd5d68b2b2821aa3c7f1f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F3 17160 bytes
font_01_sfnt_off0000e24c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 16792 bytes
font_02_sfnt_off0000fa63.bin
08da5e4e68bbb71df8df69270947ca13c0b49ac25ad8d65ebcc273c62adb1a1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA63 10808 bytes