Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bef89393e37c91…

MALICIOUS

PDF

44.5 KB Created: 2021-05-19 09:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 919690e9bab5ced1e6023f01abae8cf0 SHA-1: 53337f736bca59d46d93de170af3a1ed06cb3cf5 SHA-256: c0bef89393e37c9118f0aec2a8378fed09a54329b8b8df7091466e5b4e9baf46
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a lure for 'free Robux' or game hacks, indicating a social engineering attempt to redirect users to potentially malicious websites. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting a payload. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-do-we-get-free-robux-game-hack PDF link annotation
    • https://javisintlmedia.com/images/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://javisintlmedia.com/images/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-coin-master-app_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-game_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/robux-giver_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://javisintlmedia.com/images/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.communes.comIn 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_off0000477c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x477C 24452 bytes
SHA-256: 10d0c00a73e5c48fd9d54905183991c722032ef49afaa140363fc3f6903cdf6d
font_01_sfnt_off00007fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE3 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off000089f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F2 18648 bytes
SHA-256: 357fc7c7eb6196ee12ed3080908575177554d85b467bf9142ee0ee232c3cf829

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