Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb33459ae78ec25…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 06:53:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2bc82751dd878ce8a8a6bb2b39c92b24 SHA-1: 15b5fcdf81cb003cf5fe814442dfd4605aa906ac SHA-256: 5bb33459ae78ec2528b75527fff7e3afb25bbab179e025aec8d9ddc600af76c0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, specifically mentioning 'Pubg 700 Uc', and links to a URL that is flagged as a game hack redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of embedded URLs and the lure suggest the document is designed to redirect users to a site that likely hosts malware or facilitates further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/1330123889/pubg-700-uc-game-hack PDF link annotation
    • http://library.acehresearch.org/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/oginject-co_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-tool-v1-9-download-free-pc_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
stream_004_off00004bb2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB2 26208 bytes
SHA-256: e798bcac067e4281273e57c78cbaf1dfce41804a17cf40cbbfe233a70bb5940f
font_01_sfnt_off00008668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8668 18128 bytes
SHA-256: 846dbf183307d8f6e64f9fe21baf3014a6636cea9664c4cc2f62249f657563a4

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