Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6741bb5740c51b…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 16:59:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 29ece9cc6b57724885eea446335fba5c SHA-1: 5c14d63e2c0cfda61b624e6e45b74469222d796e SHA-256: 7e6741bb5740c51b5e9ee14133e343badee46e969b5496d2c18b4997c340f24b
202 Risk Score

Malware Insights

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

The PDF document contains numerous links disguised as generators or hacks for popular games like Roblox and Coin Master. These links, such as http://netcdn.co/app/431946152/how-to-make-a-shirt-in-roblox-free-2021-game-hack, are designed to trick users into visiting malicious websites. The presence of a 'download button' lure and a 'browser extension installation' lure further supports the social engineering aspect of this attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.co/app/431946152/how-to-make-a-shirt-in-roblox-free-2021-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/blox-rewards_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-roblox-android-step-by-step-anddoid_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cheat-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-noclip-hack-no-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cheat-code-roblox-pc_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-colouring-in-pages-free_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_off00002f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F24 22952 bytes
SHA-256: e9de947f7dd87ace65464d032abf450d2759a5e5c5a44aa9dad8243cc5eb6703
font_01_sfnt_off0000621c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 19972 bytes
SHA-256: c7be9e89e19431ec53b5daf86fe369ec5b20509801e27b68d59275e24f4a7de3

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