Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a11cbfa4a99347f…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 09:26:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c99c82b70c8605fca66ce53dd4908f24 SHA-1: 478262448ea673c1bdb9cb1c0963240461581db2 SHA-256: 7a11cbfa4a99347f066186262f04265ca9e8f5ddf8abab5b5997ec26b20f9f53
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users to click on embedded links. The primary link, http://netcdn.tw/app/406889139/daily-free-spin-and-coin-game-hack, is identified as a malicious redirector, likely leading to further malicious content or downloads. The document's structure and embedded URLs suggest an attempt to exploit user interest in online games and rewards for malicious purposes.

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/daily-free-spin-and-coin-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-clothing-catalogs-in-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-sentry-in-all-out-zombies-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-denis-roblox-account_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-jailbreak-cheat-menu_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-roblox-codes-2021-may-sunny-hollow_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hack-roblox-atravesar-paredes-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-dominus-items-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/ccv3-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/tiktok-free-edits_GM835599320.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/cant-open-cheat-engine-with-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-gravity-on-roblox-with-nopde_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/youtube-how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacker-outfit-on-roblox_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
stream_002_off00002fd6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FD6 22772 bytes
SHA-256: 74ac6755cf5fc6cff9a7922803254e919595cf200d87103a5bc012f1b4de3673
font_01_sfnt_off000062d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 18664 bytes
SHA-256: b6449930c387aff5a3d9291f5267988411499284c7a33d11fc817d66e697c7e7

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