Malicious PDF — malware analysis report

Static analysis result for SHA-256 17db52e229d8ce21…

MALICIOUS

PDF

42.1 KB Created: 2021-05-10 23:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6075dda7d54164a1b1d4e9564c1c17ea SHA-1: bc1d4aec530a2e03838b1794aa61f2c640890639 SHA-256: 17db52e229d8ce2118ebb0051f2a93508d4a0834e05ec4579b2051e41f01574c
200 Risk Score

Malware Insights

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

The PDF document employs a fake CAPTCHA and a lure for game hacks to trick users into clicking malicious links. It redirects to known malicious infrastructure, indicating a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded URLs strongly suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-booga-booga-hack-game-hack In PDF document text
    • http://hk-kan.org/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/instant-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-free-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/login-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/hack-download_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/can-i-get-robux-for-free_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_off000046a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46A9 25492 bytes
SHA-256: b5daa41cc93f43aa2efbbef520a58e82a120801402263ac7ab3c52afe99dc158
font_01_sfnt_off0000817a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817A 18468 bytes
SHA-256: 8f2f52aff80fb49a328e063288f2b5e4f116517157d382fa8b39f5595cbe047c

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