Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae31c9e15be82e8…

MALICIOUS

PDF

42.7 KB Created: 2021-05-15 09:05:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 20638c096667141b36948dcf6bdf3d03 SHA-1: 55106dd5a7397e7ea78e6621906c7e0cec4ac808 SHA-256: fae31c9e15be82e83837159c7a1d9be9764995d4f8abb3a3458c6f697edec8c9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free items, specifically mentioning Roblox and Coin Master. It contains multiple embedded URLs that redirect to malicious infrastructure, including the primary URL https://netcdn.xyz/app/431946152/how-to-get-free-shirts-on-roblox-game-hack. The presence of these malicious redirector links and the ML classifier's high confidence score indicate a clear intent to lead users to potentially harmful content or further malware downloads.

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/how-to-get-free-shirts-on-roblox-game-hack In PDF document text
    • http://www.actae.gr/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.actae.gr/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.actae.gr/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.actae.gr/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://www.actae.gr/images/roblox-verification_GM431946152.pdfIn PDF document text
    • http://www.actae.gr/images/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.actae.gr/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://www.actae.gr/images/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://www.actae.gr/images/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.actae.gr/images/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.actae.gr/images/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.actae.gr/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://www.actae.gr/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.actae.gr/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://www.actae.gr/images/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://www.actae.gr/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.actae.gr/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://www.actae.gr/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.actae.gr/images/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.actae.gr/images/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_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_off00004a4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4B 25368 bytes
SHA-256: 98260d51bdc5b9fc5e0529bd95c1ef63920f95cbbcc425c75ce6ffd04481f290
font_01_sfnt_off000083fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FE 18500 bytes
SHA-256: 0913aca000174c5e77b5d0e65f3ee2ebb36c614e623a410724f75da42fa667ca

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