Malicious PDF — malware analysis report

Static analysis result for SHA-256 238c897d12ba1a98…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 01:31:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 49c76f5911c00b06c01562ae9b1c841d SHA-1: 5f98f9bef31c53cf534056cd5f38df58a53ede63 SHA-256: 238c897d12ba1a98bc9cb08d725a92f89d49997f3878255ce4cc158c0f24cc53
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and server hosting to trick users into clicking malicious links. The embedded URLs, such as http://netcdn.tw/app/479516143/minecraft-bedrock-free-server-hosting-game-hack, are identified as malicious redirectors. The document's structure and content strongly suggest it is designed to lead users to potentially harmful websites, likely for credential harvesting or further malware distribution.

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/479516143/minecraft-bedrock-free-server-hosting-game-hack In PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-jailbreak-noclip-hack-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/exosite-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-for-all-even-noobs_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-hack-roblox-accounts-without-cookie_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/asshurt-roblox-multitool-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/pastebin-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-hack-8-ball-pool_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/admin-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/hacking-the-condo-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/boy-clothes-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-free-gear-items_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/funcionando-nuevo-hack-roblox-jailbreak-phantom-forces-booga-booga_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/free-coin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-hack-app-android_GM406889139.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_off0000328c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328C 22340 bytes
SHA-256: 5488d967fe8bbc4e78b73e8ae8d0f9e3b24c5819f64a27d9aaeaa8d772966381
font_01_sfnt_off0000635f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 18672 bytes
SHA-256: 5baa597ceebb7173861118a54c9708b38703675a1839245e0c8f4bf1dfc6d3a9

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