Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27f4cc2044474e1…

MALICIOUS

PDF

44.6 KB Created: 2021-05-16 08:06:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7af2f168ec277ce1de6459af366412ed SHA-1: d520246c864168ea782b48778b7cbdf2d63e5ab8 SHA-256: a27f4cc2044474e1b43932aa765e0aef7b0013fd38d414bc89a0019b3367dfbb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9632

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/free-spins-on-coin-master-link-game-hack PDF link annotation
    • http://innovativefs.co.uk/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/give-free-robux_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/simplysarc_GM479516143.pdfIn PDF document text
    • http://innovativefs.co.uk/images/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/are-minecraft-realms-free_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
font_00_sfnt_off00004927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4927 25968 bytes
SHA-256: 40a56ea693eae3482d90695c5f23b152ba0fe95cf2872f2e40926fdae1c2d5fa
font_01_sfnt_off000082ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EC 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8E 18056 bytes
SHA-256: 892ebf3b86ae534fd3f474e2c239da2a9bb4dc91f8225dc09222a78aadec1336

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