Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dc30d18a9c0082…

MALICIOUS

PDF

34.4 KB Created: 2021-06-28 10:21:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4516d7b897f57985341bd971df01b173 SHA-1: d11b5bdcdf5381916f22e5762b513de1fc40e335 SHA-256: 08dc30d18a9c0082f44e88059d6c3ba0e13d29b2c2337b043ebdcc24b5822af2
180 Risk Score

Malware Insights

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

This PDF document employs a lure of free in-game currency and hacks for popular games like Roblox and Coin Master. It contains multiple embedded URLs, with a primary redirector at http://netcdn.co/app/431946152/free-unlimited-robux-on-roblox-game-hack, which is flagged as malicious. The document's structure and content strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/free-unlimited-robux-on-roblox-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-on-roblox-online_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-people-make-roblox-hack-tools_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-2021-inspect-element_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-roblox-accounts-2021-april_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hacked-client-windows-10_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-call-roblox-on-pc-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-final-stand-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hacks-download-2021-with-virustotal_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-a-free-2021-roblox-acc_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-dragon-ball-z-final-stand-hack-script_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_off00002fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB0 21880 bytes
SHA-256: 9194413c5252e89b00527b03150a596cf00f580c722f8f1869f48f2e4342872c
font_01_sfnt_off0000602b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 19448 bytes
SHA-256: c0a6969fcd58c53a06a51ee3a27dc1ed8bdb5125950133e51e75b4019565d5a5

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