Malicious PDF — malware analysis report

Static analysis result for SHA-256 84cb982b22e0b313…

MALICIOUS

PDF

37.1 KB Created: 2021-05-21 15:24:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ee14a4e6c044acabecb90a3fe0f11aa6 SHA-1: 1d40a35635657ca9f575506738b45aa842a24e5b SHA-256: 84cb982b22e0b313d1bebbb997be97f57546330ce2f5af226999d8abe4157c93
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 0.9447

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/431946152/roblox-booga-booga-hack-game-hack PDF link annotation
    • https://www.fhccu.com/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://www.fhccu.com/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-hack-apk-download_GM406889139.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_off00003376.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3376 26528 bytes
SHA-256: c6de70da44d5b42c5c07c333c362df2c461f55eed234cd751bf827653ef8e9ac
font_01_sfnt_off00006f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F10 18468 bytes
SHA-256: 8f2f52aff80fb49a328e063288f2b5e4f116517157d382fa8b39f5595cbe047c

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