Malicious PDF — malware analysis report

Static analysis result for SHA-256 308068d3bd9c2c63…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 11:13:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c0ad729b39126f4378f53d8a0631708c SHA-1: 799e925a19e679dc4201722bb611f3d6c521c2f4 SHA-256: 308068d3bd9c2c63d2bf91d344324d296b9035e4c94a41bdb643dd365ae55bdd
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games and services. The primary lure URL is http://netcdn.tw/app/835599320/tiktok-free-view-iphone-5c-game-hack, which is associated with malicious redirector infrastructure. The document's structure and embedded links suggest it is designed to trick users into visiting malicious sites, likely to download further malware or engage in phishing. No scripts were extracted, but the PDF's nature points to exploitation for client execution.

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/835599320/tiktok-free-view-iphone-5c-game-hack In PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/venesix-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-roblox-accounts-with-admin-permissions_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-do-you-get-thengs-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-no-download-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/change-your-roblox-name-for-free-reddit_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-generator-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-cheat-engine-bypass-v3rmillion_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hack-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/chrome-shortcut-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/pin-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/sites-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_off000030cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CD 22196 bytes
SHA-256: 6a688776a2d28bad66dca2cf5526aeb495d4c35243f613849b6c1e86e62b6aff
font_01_sfnt_off00006208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6208 18748 bytes
SHA-256: 74486a951fc6694c48fc5fe050a5682a527a52d5e4ec004eac0e0db1ec1b2f6c

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