Malicious PDF — malware analysis report

Static analysis result for SHA-256 996b0e74faf562a9…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 12:10:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 52e4847ea1c3ca978fb4fd9bccbe3cb6 SHA-1: b34576e48f29a7a6d3a271497e38446da209c634 SHA-256: 996b0e74faf562a9b4d7b27866ce9b72558458fc2ab0cdad6d911ee251983a36
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics indicate a lure for 'free Robux' or 'game hacks', which is a common social engineering tactic. The primary link, https://netcdn.xyz/app/431946152/free-robux-script-game-hack, likely leads to a second-stage payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-robux-script-game-hack In PDF document text
    • http://reggieslockandkey.com/images/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-redeem_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-executor-roblox_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-hack-coin-master-game-without-verification_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_off00004950.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4950 25132 bytes
SHA-256: 47fde83b2352f467a2a3429822de532a6bfdd48f5d5087c75c48c68f883207ed
font_01_sfnt_off00008304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8304 18416 bytes
SHA-256: 7904477eb6282cb79bb1f8d95588be1a5283b3abf5667e30a4d761915d4b26ef

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