Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79b4cc19a80d215…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 21:22:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4dd0474fa05de9afafe64baba11ce91f SHA-1: c9e369b96424bf10c9d683d8069faafbe91aec4a SHA-256: d79b4cc19a80d2157fe092aa3ce58a2072da9b7850d1a8fa5570b595a3db79e9
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/479516143/free-minecraft-java-account-game-hack. This suggests a phishing or scam attempt designed to lead users to potentially harmful websites. The document body and heuristics indicate a lure for game-related cheats or accounts, consistent with social engineering tactics.

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.tw/app/479516143/free-minecraft-java-account-game-hack In PDF document text
    • http://lib.mbp.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/earn-free-robux-the-legal_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-cheat-wall-glitch_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/cheat-prison-break-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-robuxian_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-unjailbreak-hack-executor_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-download-nonsense-diamond-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-hack-people-in-roblox_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_off000032e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E9 22932 bytes
SHA-256: c3d5a81b3fa06b6d2addd18bd311a07b75670fd25f859766679baacd0d46b98f
font_01_sfnt_off00006682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6682 18420 bytes
SHA-256: 1c3f9368ae9341fd87c323918a5db0c95def7528b1578e993c766083598f8ad6