Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c07ecc7d35953bb…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 07:46:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a9beaa129057d7770eab0682d444c121 SHA-1: 7c9f26b6dc4b382a561a5fa52876c1df519d98de SHA-256: 3c07ecc7d35953bbe108ef5e6a89b31a5d58f25e35545f8ede10bb166d4dbdcc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure the user into clicking on a 'free generator / game hack' or similar offer. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow, likely intended to lead users to a credential harvesting or malware download site.

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/oprewards-free-robux-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-2021-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-hack-roblox-mad-games_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-play-no-download-online_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/mcpe_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.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_off0000321f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321F 22620 bytes
SHA-256: 2803b09659da029c74a247e2e4531396bb9873b8df90f7641b1ada867a12bdfc
font_01_sfnt_off000064e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 19228 bytes
SHA-256: 28d2551d9716c0c1f642d1de59876c155fe982ad5f1d32fc26186d5dbb125a3e

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