Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db4fd2a9306c2c1…

MALICIOUS

PDF

36.0 KB Created: 2021-05-22 08:37:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 84026d20613bb737ba9a4e15c541d183 SHA-1: 6a472081e906ca6b7ca6e8a7098f8b68ccbb3690 SHA-256: 4db4fd2a9306c2c1007581081ddfb21c1d8510a07a364f35152de2c72479eaed
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 0.9492

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/how-do-i-get-free-spins-on-coin-master-game-hack PDF link annotation
    • http://addair.co.uk/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://addair.co.uk/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/minecraft-pocket-edition-free-download_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
stream_002_off00003255.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3255 24872 bytes
SHA-256: 19e24a0a587731dcaef7334a03cdf157e2cd8283e57fd23e0000e12e1a1039a3
font_01_sfnt_off00006baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAA 18216 bytes
SHA-256: 7b3dc5054b0587ec41e602859ac4e59ac97ec46c9406b1b4182074b4d7a08153

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