Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0d8afae6918e78…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 12:37:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7f28b3d9263930d9654754e8bcc7b220 SHA-1: 324a553a0bfaf37bb3f3abab1a5e96edf81d04b9 SHA-256: 7d0d8afae6918e7837ea7a283c2b1942e0f3cd910d2f104ad2d377c7f5d7e600
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure for 'free Robux' and game hacks, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs indicates a likely attempt to download a second-stage payload or redirect to a phishing site. No scripts were extracted from this sample.

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/free-robux-for-free-game-hack PDF link annotation
    • http://nevesomost.by/images/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://nevesomost.by/images/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://nevesomost.by/images/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://nevesomost.by/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://nevesomost.by/images/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nevesomost.by/images/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://nevesomost.by/images/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://nevesomost.by/images/rbx-place-free-robux_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_off00004a6b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6B 24824 bytes
SHA-256: 15a71a686c0efe4ef1826acccc44a99cca0d5f510b0d475ee68b1c0bedd71e23
font_01_sfnt_off000083cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CB 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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