Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82ce3705f2108af…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 03:39:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 34d430e4cefb616438db9b9f788df533 SHA-1: 59be4f966a48b1f0746e38dccef295ae9e37d863 SHA-256: b82ce3705f2108aff35d393cfcd06cfd52920ff5e1bdf1c9c52c49b7fcf1f685
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links that redirect to websites offering game hacks and cheats, such as Roblox and Coin Master. The primary link, http://netcdn.tw/app/431946152/roblox-hack-download-pc-game-hack, is identified as a malicious redirector. This suggests the document is designed to lure users into downloading potentially malicious software or visiting compromised sites under the guise of game-related utilities.

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-hack-download-pc-game-hack In PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-free-to-play-game_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-free-play-online-login_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hack-de-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/getting-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/infinite-moneyz-roblox-injector-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-generator-2021-ad_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-link-today-facebook_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_off0000341e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x341E 22496 bytes
SHA-256: df11795c250bdad4d3d121f941e4dcbacc049269d0817e1960d9e2ab6522ae15
font_01_sfnt_off0000667a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 19316 bytes
SHA-256: f7e1569b35dd9ea38dfb046f4486bccf47f5ffb509dcfc8bcbaa088fb7facdac

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