Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00fe959d685533e…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 04:44:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c295480f86c46f5bc71050fae7c822b6 SHA-1: 599f7da1798790e3b13b6b7d89bf8cc3ec46c080 SHA-256: b00fe959d685533e877be96f9e65322c55996f5c4042e5bc025a68772795e22e
142 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are SEO-optimized pages promising game hacks and free currency. The primary lure appears to be related to Roblox and Coin Master, directing users to potentially malicious sites like 'netcdn.tw'. This suggests a phishing or scam campaign designed to trick users into visiting compromised or malicious web pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/robloxmatchcom-free-robux-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/tiktok-free-views-2021_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-sit-fly-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-2021-today_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_off00002c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C92 21540 bytes
SHA-256: 518f319d2a25cad59e2cc18a261db9302253552d1ee3d57280e81b2ef7d4d73f
font_01_sfnt_off00005bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF7 19320 bytes
SHA-256: 0d578fc51ad0f188a9c4505a85014dba64e81475c3b1c73d40a415d6db3d1745

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