Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11836783a527602…

MALICIOUS

PDF

47.6 KB Created: 2021-05-19 23:31:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1c3bd782aa2679dd300eb2e6519ea3f7 SHA-1: 78b0eb937a3fafe10daeec8b320ae7acd2d3ba24 SHA-256: c11836783a527602583e745f5e8a3ddd6d62d16ce78bff3d68f5ca89380bf6a5
200 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to a 'free Robux' generator, masquerading as a game hack. It also presents a fake CAPTCHA or human verification prompt to trick users into interacting with these malicious links. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-no-survey-or-human-verification-game-hack, which is part of a chain of redirectors. The document's structure and content strongly suggest a phishing or scam attempt designed to lead users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/free-robux-no-survey-or-human-verification-game-hack In PDF document text
    • http://iluvlocalplaces.com/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/robux-website_GM431946152.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/robux-xyz_GM431946152.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://iluvlocalplaces.com/images/coin-master-hack-without-verification_GM406889139.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
stream_003_off00004b67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B67 28160 bytes
SHA-256: 8badf64e49bbb5335cdb06645e6e34c79fe941a9f7350f431d76c5bc387e52be
font_01_sfnt_off00008b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6F 2820 bytes
SHA-256: d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b
font_02_sfnt_off00009509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9509 19156 bytes
SHA-256: 740843b016d65d6d98e94234348adfc338e782053996300107113ffe61ddc4f5

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