Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf9c560cad0c19a…

MALICIOUS

PDF

50.9 KB Created: 2021-05-19 17:51:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 93460c9ebbfeb2a38097ab94d0275177 SHA-1: ab557d989c9ea1b55ed8def562c4deaa7d9476e5 SHA-256: daf9c560cad0c19a3b0f76e7e123a1e5db42037a736e79c476eb42207653913e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for game hacks and free in-game currency, directing users to a malicious URL. It also displays a fake CAPTCHA to trick users into interacting with the document, likely to trigger a download or redirect. No scripts were extracted, but the embedded URLs and the fake CAPTCHA lure strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9300

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/promo-codes-to-get-free-robux-game-hack PDF link annotation
    • http://sbm-nn.ru/images/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/tiktok-unlimited-free-trials_GM835599320.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49A0 26884 bytes
SHA-256: ca3de53498e2496b18370435ad6f6aa47432f790161d56a7cfde9605340b6a9e
font_01_sfnt_off000088ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AD 8252 bytes
SHA-256: 7ebedd6b182173c8e55836cb0d114b2c4a0ac85c96a51b9f0706c935f8415fea
font_02_sfnt_off0000a3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C1 18704 bytes
SHA-256: 994ba2c21992eebcab5dcb0bf7b99b22a17e2009da779e2696cdc2096136ed4a

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