Malicious PDF — malware analysis report

Static analysis result for SHA-256 559371a57748aa48…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 04:19:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f5b33b17341fab4a1f0a0cfe7caf921e SHA-1: dd98e1676f9afde263a238a903ab6fe7a0529f56 SHA-256: 559371a57748aa489f9222c3be87e3a44287e3dd9af0502427f0f8d08095bf11
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and links to external URLs, including one identified as a 'free generator / game hack' lure. The document body, though partially corrupted, also contains references to game hacks and download links. This suggests the PDF is designed to trick users into visiting malicious sites that likely host malware or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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://netcdn.online/app/479516143/minecraft-rtx-download-free-game-hack PDF link annotation
    • https://sundae.co.th/js/userfiles/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/make-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D7 24680 bytes
SHA-256: 275c24f3ab304d427c19075834d16a09eb86821baf9f572cce9e6049912a351b
font_01_sfnt_off00008ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA7 18500 bytes
SHA-256: 5f3bdd779ddaacede8957d9864e28e9a9e9e2ea303e248dbf894cd003605836d

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