Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c51f352e9835cf…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 05:35:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0b78933d581fd809c88bde53feb9e952 SHA-1: 13b5189c0e6b44a5c3b161f5917ec750e23a09b4 SHA-256: 83c51f352e9835cfc510a5d0763689b99dab3e590a082241f6273f9f2f88f1bf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and generators, directing users to a malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/roblox-shuts-down-when-i-open-cheat-engine-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/pokemon-go-free-007_GM1094591345.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/tiktok-free-coins-apk_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-human-verification-generator_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_004_off00005129.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5129 25952 bytes
SHA-256: bf59ac25a7a337328b138118778dbe65a50a096891bb710f44e5b2ff7bc391fa
font_01_sfnt_off00008ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA6 19536 bytes
SHA-256: 128cc96257d7fe3192cf60000ea5c444231d0ab4a0b8d724b1bb9e7d8b369242

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