Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a29e678d7687b9…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 12:25:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2cb8963b1df0aa25da97810d82f55675 SHA-1: eb964a6766ca0d489c40cba3803e4b7220fbf0ca SHA-256: 86a29e678d7687b981041f28adb5d7ad4d4fe6dbc76c5a8803cac22b6dea5f89
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, disguised as 'game hacks' and 'free coins'. The document body explicitly requests recovery secrets, indicating a phishing attempt. The embedded URLs likely lead to a second-stage payload or credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.online/app/406889139/coin-master-free-coins-and-spins-link-today-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robux-page_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off0000500a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x500A 24628 bytes
SHA-256: ad2116facf0f44dc8d08c72106375a6b1ec6ba0fd6df490e7e73e3eb923a2a0c
font_01_sfnt_off000087a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A4 18412 bytes
SHA-256: 33825415dca9230cb3646c42e74ea5f1b776d8c47be8f6fdd7469cc236cf4eb1

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