Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a23dab33e707f6c…

MALICIOUS

PDF

48.9 KB Created: 2021-06-02 21:34:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 46170c1aa68fc16a95319091d5a630fa SHA-1: 5ae2dca8c4217b79704f899110b5e943eefd8d96 SHA-256: 0a23dab33e707f6c00146bcb579f3fc4c18deeb9ebf9109da2a405f6f07a7d1a
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 0.9796

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.xyz/app/431946152/how-to-get-free-robux-birth-date-game-hack PDF link annotation
    • https://www.gymun.cz/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-items_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/rbx-earn_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-windows-10-hack-client-2021_GM479516143.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
font_00_sfnt_off000054ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54EE 25148 bytes
SHA-256: 8c5c55c275b3ecc74f8c2e64c8f2eb1d7eebbf2f0c88bd4a998dd1806ada4ec0
font_01_sfnt_off00008f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F76 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9F 18964 bytes
SHA-256: 75f5ca9563705a60020b9f6167d6e0dd85ef76336388edfd3865f1a024423350

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