Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc56177c6fd29de5…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 01:47:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3e13b75e34a5c400d8827803a1a1e7b1 SHA-1: 926714f18aa351be9c10bff8f90970a5ece24677 SHA-256: bc56177c6fd29de5ec191ba2c40183282b2f115011bd48782c8f7305c462e2b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free items, directing users to a malicious redirector. The primary malicious URL identified is http://netcdn.tw/app/431946152/free-accessories-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for credential harvesting or further malware delivery.

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/free-accessories-roblox-game-hack In PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/lua-script-pour-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-roblox-face-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/bloxxerz-co-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-hacker-roblox-for-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/what-happens-if-your-hacking-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-fake_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-hack-validation-code_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-roblux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-work-at-a-pizza-place-money-hack-script_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-cheat-robux-in-roblox-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_off00002e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7F 22280 bytes
SHA-256: 8b300a9b20f2be8e694e23c8b1824efe1f7735480ac66c4999e82f0183c8f107
font_01_sfnt_off0000600c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600C 18768 bytes
SHA-256: 0bceb8a8dc7ef29793148dfd9dee48c7d10a17c2b63897691a01a60fe989334f

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