Malicious PDF — malware analysis report

Static analysis result for SHA-256 994ab8a8ee3ed465…

MALICIOUS

PDF

34.6 KB Created: 2021-07-02 07:27:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b2cf31e5cf21bcebbd6a9b0eceeecaea SHA-1: 5d97b9cd0d36e1f007429fc9c5d06127c1ac8f8b SHA-256: 994ab8a8ee3ed4652757c6b0a563ef8c34da10433448f59b284215a8c1bc169f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as "free generator / game hack" lures, directing users to potentially malicious redirectors. The ML classifier also flagged this PDF as malicious. The embedded URLs are designed to trick users into visiting sites that likely host further malware or phishing content.

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/free-robux-cheats-codes-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/cheat-extension-google-pour-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-site-robloxcom-robus_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-coins-in-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-online-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/como-ser-hacker-en-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-para-coin-master-sin-verification_GM406889139.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_off00003105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3105 21920 bytes
SHA-256: beae9da42d86c88c3cab7591f58f199f55d0a5a24fa9522661f90c1635be9e2d
font_01_sfnt_off000061bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BB 19160 bytes
SHA-256: ba10fcf78e55566dfc8213f242372e941af92b381cb007e94645661014d27aa2

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