Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e51b8b8192b6e9…

MALICIOUS

PDF

34.0 KB Created: 2021-06-29 07:39:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 472dcf19aa707dd3d651c902c06f6d58 SHA-1: e0f679791f07c035bc5d13cc56a93b0720e98e80 SHA-256: 03e51b8b8192b6e9f236ff730252eca82080124969e31826f3d629311981d895
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, presenting a 'free generator' or 'game hack' to entice users. It contains multiple links to known malicious redirectors, including http://netcdn.co/app/431946152/get-free-robux-without-human-verification-2021-game-hack. The document also instructs the user to copy and paste content into a shell, indicating an attempt to trick them into executing commands. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/get-free-robux-without-human-verification-2021-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/cheats-on-roblox-assasin_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-airport-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/enter-password-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-in-arsenal_GM431946152.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
font_00_sfnt_off00002c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4D 21980 bytes
SHA-256: 505291c38987344a0a8f8794c893cf5d2a650596b899651100e8937f4f5a5fb8
font_01_sfnt_off00005cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDB 20100 bytes
SHA-256: f7db2331e4b78da9fda9cd299f691156490b6f7fb67f69d50bc018fcd49f837f

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