Malicious PDF — malware analysis report

Static analysis result for SHA-256 44664cd8d54485c4…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 23:07:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 98c652d9079609ca45e29e7781f84841 SHA-1: 3ca70d8c51ea92681902cc92964a3922912fbf70 SHA-256: 44664cd8d54485c45873f946d6ed88593d24ac6e6334aab6f3942b56077e47d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The embedded URLs, such as http://netcdn.co/app/431946152/roblox-free-purple-hat-game-hack, are identified as malicious redirectors. The document's content and the heuristics strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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.co/app/431946152/roblox-free-purple-hat-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/more-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-download-google-play_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-prison-miner-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-i-change-my-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-mod-version-free-download_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
font_00_sfnt_off00002ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC4 22560 bytes
SHA-256: 8f10a59b3bfcd2bc89ba0d8a25d38aebdd6a07ee3d04d15e6f9494931045a23f
font_01_sfnt_off00006136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 19224 bytes
SHA-256: 473e58cca64f7ec5322f68f622ec1af4fb16dbb497844b8a943416e8ed00ad10

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