Malicious PDF — malware analysis report

Static analysis result for SHA-256 738ebc64adb59e9b…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 22:13:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4f25d0042b17ccbdf693eebfd62c1122 SHA-1: db9b09a819528830fef4ec790170fb6867d73130 SHA-256: 738ebc64adb59e9b7736167c70ce8eb6adb916ad6f73903026eee01de695f41c
160 Risk Score

Malware Insights

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

The PDF contains a link to a 'free generator / game hack' which is a known malicious redirector. The document body, though partially corrupted, contains similar URLs and references to game hacks, reinforcing the lure. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

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/431946152/roblox-fly-hack-game-hack In PDF document text
    • http://library.umla.ac.id/repository/who-did-tje-hackers-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/autospin-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/pokemon-go-free-walk-ios_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-now_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/pokemon-go-free-codes_GM1094591345.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_off000030b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B0 22596 bytes
SHA-256: 74d74b01c006d83d4bb21d806516760257b59fd3c5e64502a98c185a24d4983a
font_01_sfnt_off00006358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6358 19000 bytes
SHA-256: 85597ddf86b547b1587e1575dd14eab6ad0408ff1d5dd1947e703cb703eeca41

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