Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8410ed188736f3…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 08:17:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2c7b664c2e13abae8c8518fcf6a28517 SHA-1: 0ca1b95fe29efb835fbd4e6e89e8e09bb8042051 SHA-256: 7b8410ed188736f3fb0edccec8b017d778a9b5fb557dc54ff91733b7dd98de32
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free in-game currency and hacks for popular games to trick users into clicking malicious links. The primary malicious URL identified, http://netcdn.tw/app/406889139/coin-master-daily-free-spins-link-today-twitter-game-hack, is flagged as a known malicious redirector. The document's structure and embedded URLs suggest an attempt to direct users to potentially harmful external content, likely for financial gain or further malware distribution.

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-daily-free-spins-link-today-twitter-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-stuff-on-roblox-catalog-on-phone_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-adopt-me-money_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/hack-for-roblox-wont-gey_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-mad-city-cheat-to-kick-people_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-grayphiny_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-make-a-free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/can-you-get-free-robux-from-creating-a-game_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-free-sonic_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E8 22324 bytes
SHA-256: dd38e3f51288483daa28bdd0028c8590104d2e82413001076eadfb94c452528f
font_01_sfnt_off00006278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6278 19104 bytes
SHA-256: 4fb71c62595c0ba798f7eada658cc8437ba4db9c40b59a81228587155256b1f3

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