Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc6c779dfaa11b3…

MALICIOUS

PDF

34.4 KB Created: 2021-07-19 14:00:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4a84ab32e4fb844ec44a023dfed9e909 SHA-1: e14d31d0a7bd4cf7b976d91cb024aa37ebcc856c SHA-256: 5fc6c779dfaa11b37bfb53c8e1af6e113b1c1abe103d8aaadceeb218c78eb3d4
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 0.9955

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/406889139/coin-master-free-spins-link-2021-today-game-hack PDF link annotation
    • https://soma.com.ua/images/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://soma.com.ua/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://soma.com.ua/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://soma.com.ua/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://soma.com.ua/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://soma.com.ua/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://soma.com.ua/images/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://soma.com.ua/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://soma.com.ua/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://soma.com.ua/images/coin-master-free_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_off00002bec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2BEC 24096 bytes
SHA-256: 217e29285a6ce5b6fd36ff168511d63b76422604121e340e440043a0c55112f0
font_01_sfnt_off000062e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E8 18812 bytes
SHA-256: 705c5903f824403b328e8e9dbd2ab52a650d097fc3c0d4bbd34be772086d041a

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