Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2feb9db814ef98…

MALICIOUS

PDF

36.0 KB Created: 2021-07-06 11:14:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0592b527f4b806ee80fd3504fa10e5cb SHA-1: b9d5d4659599242c619cb280d54e1305b2e4e2c2 SHA-256: 2b2feb9db814ef9821c7c7c63b8b8126e4f2778d7a9a78d3830625a97668cccd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox. The primary lure, 'http://netcdn.tw/app/431946152/how-to-get-free-robux-without-paying-game-hack', is identified as a malicious redirector. This suggests the document's purpose is to trick users into visiting malicious sites that likely host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-without-paying-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/reddit-someone-hacked-my-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-shirt-bot-discord_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-tycoon-model-roblox-with-dev-purchases_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/gaming-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cheats-para-ben-10-universal-showdown-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-promo-codes-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/crimson-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-credit-card-generator_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-create-a-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-change-your-username-on-roblox-for-free-2021_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
font_00_sfnt_off000033e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E0 22308 bytes
SHA-256: bae8896f0f29356c9264ffd213f2a6445d62eec20d5cf20de0a2ebfd448ad58d
font_01_sfnt_off0000658c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 19800 bytes
SHA-256: 1d61554b41e4a561f8cce96d416cb414ffdc77e661a84b072bd4f12fb61e75a1

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