Malicious PDF — malware analysis report

Static analysis result for SHA-256 48376f70907ba6b3…

MALICIOUS

PDF

34.8 KB Created: 2021-06-19 14:30:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 48aa7d6914ba5715375ef9cf25af8e21 SHA-1: 19a652c96b8fff0d95705f9fcd9066e1534ecfd6 SHA-256: 48376f70907ba6b328a8125817c01b64ca2fcdc29c8ef6e3d115750f1105372a
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 primary lure, 'Hot To Get Real Robux For Free', directs users to 'http://netcdn.co/app/431946152/hot-to-get-real-robux-for-free-game-hack', which is flagged as a known malicious redirector. This suggests the document is designed to lead users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hot-to-get-real-robux-for-free-game-hack In PDF document text
    • http://energyx.com.tw/image/data/files/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/roblox-free-items-inspect-element_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/roblox-hack-smurf-backpack_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/pubg-2021-uc_GM1330123889.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-walk-through-walls-on-roblox-useing-cheat-engine_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/rbx-free_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-free-spins-hack-link_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_002_off00003096.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3096 22736 bytes
SHA-256: ceb048b3fdd0f06076f91cdf520c1ab82794744b7ed067a109a52becb9c36eb5
font_01_sfnt_off00006372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6372 18896 bytes
SHA-256: 3adb3f0f699ebb527fae952c43a8a2a8705bd9ae59fac2adfafe598ef6deb702

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