Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9293ecf67c295e…

MALICIOUS

PDF

43.1 KB Created: 2021-05-17 13:13:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b831d00edcfeec0a0eaf30b4952dc6d4 SHA-1: 6a6b7f0b07aeed920cc61deb5d7160bd3dc64040 SHA-256: 7c9293ecf67c295ef24fcb8e27b9eb7f0dadb30a2a0add432e71355ac525e5f7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to websites that promise game hacks and free in-game currency, such as 'Robux'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically flags this behavior. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

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/431946152/rbxoffers-earn-free-robux-game-hack PDF link annotation
    • https://ceiprevellodetoro.org/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/coin-master-official-website_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-robux-net_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/how-to-get-free-robux-not-a-scam_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_off00004dab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DAB 24564 bytes
SHA-256: 11b2be498833fcfabe1b4f54a3dd3ffa97ba2858804c76d0612af999c6eb5415
font_01_sfnt_off00008638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8638 18244 bytes
SHA-256: fa7b58e8bbd6048af1f0a6b5440a1dcdf7c9ae2c9f232fd911927377916bfdb1

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