Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b494f87ba50e6a…

MALICIOUS

PDF

35.0 KB Created: 2021-06-18 09:39:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d3f74bad31c0dad43aadce224b0ade97 SHA-1: 3fe051130c6b5e87802135558a86ed632cac7f05 SHA-256: e8b494f87ba50e6a05ceafc9ac93c37620cf82483f7f66d598029b2b1eaf730b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that lead to a known malicious redirector, masquerading as a generator for game hacks and free accounts. The document body and heuristics indicate a lure for free game currency or accounts, directing users to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/roblox-free-bc-account-2021-game-hack In PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/roblox-players-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/websites-to-get-free-robux_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_off000032d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D3 21812 bytes
SHA-256: 1df9419e8053c0aa1abff9b3cf84b76f66e42f9feab1b24b141f814e65aebd9f
font_01_sfnt_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 19296 bytes
SHA-256: 9a9646242ae05cfad0611cc8c540aa04a9f31736c28eb7965e9054861e0d4b30

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