Malicious PDF — malware analysis report

Static analysis result for SHA-256 9576ec0aca5da540…

MALICIOUS

PDF

51.3 KB Created: 2021-06-09 17:22:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b430ee802fd988c09b983bb4d6d82eef SHA-1: fee3cd1580d880915c68529b46317bc17f089efd SHA-256: 9576ec0aca5da540191a4e12578c780b7e09e1707ab2af5ddac2564f81a986a6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 4

  • 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.
  • 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.tw/app/431946152/how-to-hack-roblox-model-not-for-sealf-game-hack PDF link annotation
    • https://susantomeubel.com/ckfinder/userfiles/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/free-robux-generator-momo_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/free-tiktok-25-likes_GM835599320.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/rewards-robux_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FB 30296 bytes
SHA-256: 4d73d49bfd99dd91b4fa972d5ae17f0b6c9d566cd6ee24774a22b9a917f60ad7
font_01_sfnt_off00009855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9855 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off0000a3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E9 18984 bytes
SHA-256: 1775c1533603c2a0bf1c9ffbd3070c44e3633a97692d4f2a2f692991cc13e91f

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