Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bcf9c6d0684bf40…

MALICIOUS

PDF

43.1 KB Created: 2021-06-13 22:32:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d8e6017ae0eced469914fec1f217a0da SHA-1: c5dfeb88f7524a0e458d7644247b98714d45e4da SHA-256: 3bcf9c6d0684bf4063fc2fc0a7d1f5ee405889a764ded263c72eef3b13596014
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure related to game hacks and generators to entice users into clicking malicious links. The document displays a fake CAPTCHA or human verification prompt, a common tactic to trick users into executing further actions. The embedded links, such as http://netcdn.co/app/431946152/how-to-hack-phantom-forces-roblox-lvl-hack-game-hack, are identified as malicious redirectors, indicating a high likelihood of leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://netcdn.co/app/431946152/how-to-hack-phantom-forces-roblox-lvl-hack-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-2021-august_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/xray-for-roblox-for-hacks_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.roblox.comIn 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_off0000458e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x458E 27076 bytes
SHA-256: e875229d634521d132151afcdcf5c2950206724950011e1fc5a2591acdad2b5c
font_01_sfnt_off00008317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8317 19308 bytes
SHA-256: 788c6d9c6b9083f0b3d686b4ff10101d2502e85593a624239f609421ab072d34

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