Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc369c2318da3f54…

MALICIOUS

PDF

97.8 KB Created: 2021-08-08 20:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5a94173c4144a56688253e126b9487d0 SHA-1: 1082aaf596752cb118b96db82e008a8080e5a601 SHA-256: fc369c2318da3f547dd526dea522e19b19c1a605d3f606b7d94cd1cf9d290e8f
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and multiple links to compromised websites, indicating an attempt to trick users into downloading malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a255c6e3e2---dasenifepomojiruvanav.pdf In PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/kstd5nj0r19ibkmv1bcncla31e/94272328107.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aaad594d2b4---53314178830.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/mevutexop.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/68569322402.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160840e0663a9b---90165732614.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/48419669549.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/51006169832.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/4118793827.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/78383930374.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba126430c4---652014858.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160cd388e8acc0---fonirejokiwesosidevin.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/80781874519.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/ac20b188cd67fc738c27e9f4e34089a6/komekeb.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/dukuruwidomanuguxuv.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/fe959922664e2aba2ecf545f0ca54bcc/nawisopozuxumobazakukaro.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/96otmf299si50od8vjl0mhqj86/zekugumekixibobage.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/melizuwimiluzuru.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/1176115543.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/64982044318.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/sijev.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/8a57a462852mc789rigpikqg93/39594281911.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/keguga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=maplestory+live+deluxe+mod+offline+apkPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A70 28812 bytes
SHA-256: 4580b71e95c050293fd2108b853d40f5858b309a2e01ed175665a3b0ba3c5745
font_02_sfnt_off000146cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146CB 11124 bytes
SHA-256: 616b50d7a1a80a79870c6b0695edc5edf981febc16ebc424270b650c0e7477f3
font_03_sfnt_off000160d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160D4 16184 bytes
SHA-256: 01f9b9546c48acbef3cc189a8df2c7db7add7aeb5530545c8166318a9ff50a81

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