Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a4d12cd8f9960a…

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 06:47:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: cf1be614bb24f8ec3fd5645c0e9eb6e5 SHA-1: ceb85e93c7db6e120cded1968343df4d1393c725 SHA-256: 60a4d12cd8f9960a16565874c810349a5a9d5995b4e1b2c5b131bf466e4489e2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to a known malicious redirector. The embedded URL 'http://netcdn.tw/app/406889139/coin-master-hack-free-spins-game-hack' is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

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.tw/app/406889139/coin-master-hack-free-spins-game-hack In PDF document text
    • https://dentmate.com.tw/image/data/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/indigojoe-free-robux_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-points_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/2021-roblox-place-free-bricks_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/800-robux-free-pub_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/rocashcom-earn-free-robux-by_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-t9-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/reaper-quest-cheats-engine-roblox-super-power-taining-simulator_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-hack-roblox-accounts-passwords-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/hack-para-roblox-hack-exploit_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-get-free-knives-in-assassin-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-and-tickets-generator-2021-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/minecraft-free-apk-download-016-0_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
stream_002_off000031da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31DA 23420 bytes
SHA-256: 118e5f8fd2a8a840f09ec278e1145ba444f50fcbc83d0bde8b92796c7d573f96
font_01_sfnt_off0000669e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669E 18344 bytes
SHA-256: 947667c85d24b0d3a8de245f111eeade861a88a333665e7462fd4878b305e25b

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