Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db5dbd511efa686…

MALICIOUS

PDF

45.9 KB Created: 2021-05-17 10:28:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f6b26350be3c296b7cebcda4e4e39619 SHA-1: c7cadaafdb05145c105bf1c0093a2c2944337eb8 SHA-256: 2db5dbd511efa6866374e84318029d869fc15b4830bf0adb575f429bab9116eb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks and free in-game currency, a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. The primary IOC is the redirector URL, which likely serves as a gateway to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/latest-free-spin-coin-master-daily-game-hack PDF link annotation
    • https://www.zagi.hr/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/roblox-booga-booga-hack_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_003_off000046c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46C0 27960 bytes
SHA-256: 15935a7fe794d83489de81c47e4e7faed39a4984257224f962e5c8db5a9ddd6c
font_01_sfnt_off0000868e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868E 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off000090a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A7 18308 bytes
SHA-256: 33b54ae1ad693c119f0cea53781b273ddfe293e057ee7515dcb4c42791ffe801

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