Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c83d302b426b63…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 14:16:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6e2d3adb5d6d98b3d46fc19b3cf4f649 SHA-1: a93b426023136a78cee291fd828946d4bf209685 SHA-256: a8c83d302b426b63d9d4d208d81f65cf99a1a76c8c29947727ba10796c86cdb3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary malicious URL identified is http://netcdn.tw/app/479516143/toolbox-for-minecraft-pe-ios-game-hack, which is likely used to distribute further malicious content or phishing pages. No scripts were extracted, but the document's structure and embedded links strongly indicate a social engineering attack.

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/toolbox-for-minecraft-pe-ios-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-offline-free-download_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/speed-hack-for-roblox-download_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-scam-gui_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hack-roblox-electric-state_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-oakley-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/assain-2-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-gift-cards-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-speed-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-100-working-secret-method_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hack-free-robux-and-tix-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-free-obc-accounts-2021_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_off00003172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3172 22012 bytes
SHA-256: ac432c7dfcaed45cbaf923882cc0923321083dc61369b0514cca7dd08d8daa39
font_01_sfnt_off00006226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6226 18592 bytes
SHA-256: fecfbe307641de512b59b5989f2825d68be9e1756e870c3e96e7a472ec53942c

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