Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ab2669828c5ee7…

MALICIOUS

PDF

34.0 KB Created: 2021-07-01 09:39:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 90295d5abdb03b0b795ce8a74e035935 SHA-1: 10485ec4ef5df250e7c2c2b2ce67ba0dd2072b2c SHA-256: d9ab2669828c5ee742d3d6c17f327ce5c747e46d53fe93ebdac6796bbbc5d113
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/game-free-robux-2021-game-hack. This lure is designed to trick users into believing they can obtain game hacks or generators. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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/game-free-robux-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-dragon-ball-super-2-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-change-username-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-elemental-battlegrounds-gems-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hacker-roblox-video_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-head-spam-glitch-at-roblox-high-school-legacy_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-generator-no-download-or-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-1-step_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/triga-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-obby-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheats-for-dragon-ball-rage-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-download-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-rainbow-shirt-roblox_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_off00002e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E72 21848 bytes
SHA-256: 18c022dcc7a8ea3ebe1154b0dd54d9c57d29a3f6b61f445d6d24c15222be109a
font_01_sfnt_off00005ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED1 19380 bytes
SHA-256: 71e18dbbb2795901da4802f601e3386f18b8b33149e140ef289aac86fbfa2989

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