Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e91f7865847f348…

MALICIOUS

PDF

45.2 KB Created: 2021-05-19 11:08:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dc5553f9bfa38221b9c7c02dc0225dd9 SHA-1: d462ab29f3afb882d6c1cfc5474b0de6c7baa6a1 SHA-256: 8e91f7865847f3489c415e017b535ff751b3274dbc91389a70ab1f8cc2d80df6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.xyz/app/406889139/coin-master-hack-2021-android-game-hack PDF link annotation
    • http://educhina.mn/editor/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/pokemon-go-free-candy_GM1094591345.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/app-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B6E 24784 bytes
SHA-256: 6dbc788b25e65864eca382f7b0b3b2d475c95bd14339cfc2afe8c6b39d555291
font_01_sfnt_off0000844e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844E 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF0 18292 bytes
SHA-256: 27f4b60df4c5b9b58df513bbeae6e0a7300ac945a9a466f89e8a511806a668c2

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