Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c64e448934303cc…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 18:54:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f18d69e74114a00fa9388c2111bdfbe6 SHA-1: 6b560db73b30d24309570aa66cbed7d1fd78d4e7 SHA-256: 9c64e448934303cc02914d642db5c929ffae2b1d47cc7d1b2bdf7b48f90b7e97
160 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, http://netcdn.tw/app/406889139/coin-master-spin-hack-game-hack, disguised as a game hack generator. The document's content and embedded links suggest a lure to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious workflow, likely leading to further compromise.

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/406889139/coin-master-spin-hack-game-hack In PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/counter-strike-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/free-roblox-cards-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021-pc_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/coin-master-village-3_GM406889139.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/roblox-hacker-download_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/aimbot-hack-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/free-roblox-catalog-heaven-games_GM431946152.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://elearning.manposo.sch.id/__statics/gudangsoal/files/real-free-robux-codes_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_off00003381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3381 22804 bytes
SHA-256: b6dbd3a1197fbaa74adb2ef86631079b392f4d73067df951e4a5f041d631f55d
font_01_sfnt_off00006682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6682 18180 bytes
SHA-256: a132cedd825d849e0d721dfbb1ea0ac908be68f445a4640ebf6ea6c953a82746

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