Malicious PDF — malware analysis report

Static analysis result for SHA-256 06563a46c298cf7c…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 22:46:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ee5cfea5c1f89c76bc1417ee79488139 SHA-1: 5918d2dc7624e4d2e6a37204d22912a942c38069 SHA-256: 06563a46c298cf7c9f87c1f618fa0bab9585ba6021fccf9822ddfb7e4108b3d5
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to entice users into clicking a link. The link redirects to malicious infrastructure, specifically 'https://netcdn.online/app/431946152/hack-robux-game-hack', which is associated with known malicious redirectors. The document's content and heuristics strongly suggest a social engineering attack aimed at driving users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/hack-robux-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-sites-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
stream_004_off00004e84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E84 28716 bytes
SHA-256: c7de0d68afb4f11cf0e8606879fed8922c26de8a6255eaa24235fb13aa020356
font_01_sfnt_off00008da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA5 18248 bytes
SHA-256: 9805bb7d0eadd4beaac6fd3b5d5d8b6e8e5d33c97ce909732e364f826719e5d2

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