Malicious PDF — malware analysis report

Static analysis result for SHA-256 284a48520365a5b7…

MALICIOUS

PDF

30.7 KB Created: 2021-07-19 03:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d68c23fd8ec267a0d44d9520ffea9c26 SHA-1: ae6160e8d0b46bd57bac4c35740d8f107e5d3dee SHA-256: 284a48520365a5b7ee78d598eb36bccc4ca9a53d1bde5dff6f3f5147d03cf8b0
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 0.9905

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 http://netcdn.tw/app/479516143/free-minecraft-maps-game-hack PDF link annotation
    • http://addair.co.uk/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://addair.co.uk/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://addair.co.uk/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/minecraft-apk-download-v1-144-2-free_GM479516143.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_off000029ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29EE 21104 bytes
SHA-256: 2878ca2159c843f020dd9a8a7730bf0ef54f2383db4a1a0878f3a71d4b7ed73a
font_01_sfnt_off0000578d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x578D 17744 bytes
SHA-256: 642e76b92f67015eb87e7bb2f8978493590a3d76ebc6958dd5b149369a6bd5f2

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