Malicious PDF — malware analysis report

Static analysis result for SHA-256 87237de523c6e8d9…

MALICIOUS

PDF

39.8 KB Created: 2021-05-24 04:41:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 57129c960fd1475a41b34ea4edd68971 SHA-1: 1742ec1d92767a63c694dc75ef5625400e8af1ba SHA-256: 87237de523c6e8d9d607bad0dc0d653734ad12d96230d17aaf24ed762bd3449b
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 0.8015

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/479516143/minecraft-multiplayer-free-game-hack PDF link annotation
    • http://loriginedupain.org/images/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://loriginedupain.org/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://www.freenom.comHeyIn 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
font_00_sfnt_off000036fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36FB 25080 bytes
SHA-256: 42047c6296a3ea50a1c1d9510203e83b25b4ec07b0d599c9318c5777cccf924b
font_01_sfnt_off00006fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEE 3092 bytes
SHA-256: 3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
font_02_sfnt_off00007a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A98 18136 bytes
SHA-256: 22c65de64af2721f6fc37241b86838ece151de043079d0e804f5da14bd34918b

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