Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd146fb1966a6a8…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 01:50:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6834f6b220e9124136abdc0bc2f88da2 SHA-1: cd199cdf4709bd25c88e75a4ec1e184f032c9b47 SHA-256: cfd146fb1966a6a8a62a1da435e03326455b3cad3d8490e9c96aa4958da488a6
122 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, directing users to a URL that promises game hacks. This is a common social engineering tactic to entice users to click malicious links. The ML classifier strongly flagged this PDF as malicious, and the embedded URI points to a known redirector for potentially harmful content. No scripts were extracted, but the document's structure and linked content suggest it's designed to lead users to a malicious website, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/roblox-imagine-game-hack PDF link annotation
    • https://my-private-intendant.com/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-village-3_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-spins-coin-master-hack-2021_GM406889139.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_off00004975.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4975 25428 bytes
SHA-256: 97612168ecab2a15ed197e1599317d9222471e67e9315bebb5839084ce6d8df2
font_01_sfnt_off000084a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A0 18680 bytes
SHA-256: a55166a074bb895a998fc6ba58d68b2da5fbde3090d9bd557b4756abe288ee64

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