Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0a4cd7296af06f…

MALICIOUS

PDF

43.1 KB Created: 2021-05-17 03:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 06fe8a8b3cda526c3e4611a373dcd4ea SHA-1: c9fa46e6be4fa13c63fce0debb33a3ca2cf98294 SHA-256: 6a0a4cd7296af06f02260d5564d6b3f2bcda7fb4f317bf583341c0a4fe0315db
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and 'game hacks', directing users to external URLs. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it functions as a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-no-scam-game-hack PDF link annotation
    • http://i-koinoxrista.gr/images/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/robux-link_GM431946152.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/demon-roblox_GM431946152.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://i-koinoxrista.gr/images/how-to-earn-robux-on-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_off00004a2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2E 26124 bytes
SHA-256: a05c1d14d5329edc45246cbde241b1a783382cbec52f02690104a96055fd468d
font_01_sfnt_off000085a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A8 18500 bytes
SHA-256: b3a5a2e86a30a2234a3ee6d3c2f7de48a52411aef28342c5883490dd6d64f819

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