Malicious PDF — malware analysis report

Static analysis result for SHA-256 6338231ccee268e5…

MALICIOUS

PDF

43.2 KB Created: 2021-05-13 09:21:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1c10b5660c6de35a099420eeecde77d2 SHA-1: 0f19c9d6d995592ae5bc542d016e8c12e126427f SHA-256: 6338231ccee268e56051c90c40aa49aa75d4c5fbbd916650ed2200fee9db47d6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting "game hacks" and "generators" for popular games. The primary lure appears to be a Coin Master redeem code, directing users to a URL associated with malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • 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/406889139/coin-master-redeem-code-free-game-hack In PDF document text
    • http://magnipsor.su/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-home_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-hack-roblox-to-get-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_off000049d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D9 27752 bytes
SHA-256: 8ddaa1bf073d44d0ae48f3516d1094cdeaec18544e5abc3173bf4a197c09ae3e
font_01_sfnt_off00008719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8719 18144 bytes
SHA-256: be15255cc2714f9cea0b8925ca130a4bb07aa98d7b6ddfe4ce5f10c01158a085

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