Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8efccefeed1f684…

MALICIOUS

PDF

42.3 KB Created: 2021-05-11 22:32:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bc0f8ba0827114499e67bc610a0b750f SHA-1: aacf855de7ab8001b6327994f3be0ff7580159a7 SHA-256: f8efccefeed1f6845839c843f0ddba49cf098c209bd3e06def7351264375c073
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed as lures for game hacks and generators, such as 'Master Coin Free'. The heuristic firings indicate that these links are intended to redirect users to malicious sites, likely for malware distribution or phishing. While no scripts were directly extracted, the nature of the lures and the embedded URLs strongly suggest a malicious intent to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/master-coin-free-game-hack PDF link annotation
    • http://columbuscigar.com/images/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-free-master_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/roblox-rape_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/oprewards-com-roblox_GM431946152.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_003_off00004ba0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA0 24772 bytes
SHA-256: cafd9c33202d0c63c4a390cb380099816679b3c8efcaefc3826ff3b387491f66
font_01_sfnt_off000084be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BE 17712 bytes
SHA-256: 91e2622ab411f5265f7b42a83c7ab878b3bc5f44429a3c49d98d87fe55e59feb

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