Malicious PDF — malware analysis report

Static analysis result for SHA-256 920b2e8a50c2d0cd…

MALICIOUS

PDF

32.4 KB Created: 2021-06-18 05:12:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2aa9b32c672cc63ba24362dc2e3e1451 SHA-1: 475d8aa1c8e6064f16f1a92ca664b917fa0af5ad SHA-256: 920b2e8a50c2d0cd40b04b4737dc24ad662843b8b03082054cc36993617a038a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, that promise free in-game items and hacks. The document body explicitly mentions 'free gems on Royale High Roblox' and includes a call-to-action for a 'ROBUX GENERATOR'. This indicates a phishing or scam attempt designed to trick users into visiting malicious sites, likely to steal credentials or deliver further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-get-free-gems-on-royale-high-roblox-game-hack In PDF document text
    • http://razredna-nastava.net/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-someones-profile-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-cheat-engine-game-shut-down_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/mcpe_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-free-minecraft_GM479516143.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_off000029b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29B7 21320 bytes
SHA-256: 9abdf81363ce7ed722664cbbb7811fbab842663e0ad5cf46d0bf9a029fe5a268
font_01_sfnt_off00005841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5841 19644 bytes
SHA-256: f5a14a6a1520cc4bdb638afbeea65f3901fd528a3f4331a585c4ced4f4333f17

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