Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f560decc4d5171…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 14:46:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6384d209a3e8b1617832145d2b1c92ac SHA-1: a59e1f56148f527e821769ce1d7cfdc2748d2d95 SHA-256: 64f560decc4d517126045e043b5619f1549109ea61e903ff3c2bb8b7f750b038
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game generators and hacks to entice users. It contains multiple embedded URLs, with a primary redirector identified as http://netcdn.tw/app/406889139/coin-master-free-online-game-game-hack. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

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-free-online-game-game-hack In PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/tiktok-free-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-spin-coin-master-ios_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_off0000355e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x355E 22388 bytes
SHA-256: dfcd214d3daf9f91a60a87c6d0fa46fe2c5230a81eb8ffc7d9d8697e65d54e6e
font_01_sfnt_off0000676c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676C 18332 bytes
SHA-256: 4ab4d45f9710508d772b693d83b39f768f95164e2525421f2cc6f40d4eef1e2c

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