Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5dd5bbb85aee57…

MALICIOUS

PDF

43.4 KB Created: 2021-05-16 16:35:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 61cb6039b00ca8d0892d811c306240f7 SHA-1: a7ed49dc56b5b77f771c515d1ea74bb15de6b28a SHA-256: 4b5dd5bbb85aee57d52a8112c19aa428c57d2b66f955b5230370f9eaf7d2947c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of free game currency and hacks, such as 'free robux' and 'free spins'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this, indicating a redirection to potentially malicious sites. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/lazyblox-com-free-robux-game-hack PDF link annotation
    • https://creationegyptco.com/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/rewards-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-box_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_003_off000047b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B0 27296 bytes
SHA-256: 500ed45e1c718e3632e91f033b64732e8f96c99ba9aae98755ff626589d63ec4
font_01_sfnt_off00008570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8570 18840 bytes
SHA-256: c7a12f46af2ab2e47f5138dce66a585f9a7928693d977e55c66cac0a0236f754

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