Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab74fc9511a788c…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 07:49:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8a9c0b3c72175f58738540d4c0fa52df SHA-1: 01fd8eecd7ceeeaf1604c2bc12f7d9d418fd95d9 SHA-256: eab74fc9511a788c63b54d043e86c8f9444d8f2f8a5e54f9542c935954fc91d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is http://netcdn.tw/app/431946152/give-me-free-robux-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or malware delivery.

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.tw/app/431946152/give-me-free-robux-game-hack In PDF document text
    • https://razredna-nastava.net/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-premium_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-someones-profile-on-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-peoples-passwords-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/jailbreak-roblox-cheat-may-20-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-generatorcom-pc_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/tiktok-free-online-download_GM835599320.pdfIn PDF document text
    • https://razredna-nastava.net/files/aimbot-hack-roblox-comnand-promt_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-likes-on-tiktok_GM835599320.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_off0000319f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319F 21456 bytes
SHA-256: 87c420b4e6f4ff20390e6b3010e3bad5045b80afeeec12cf88234e3debf3fbc4
font_01_sfnt_off000060bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BF 19144 bytes
SHA-256: 49caa2a42633a23caf301bb0fa3c0edf25e4e3c2cd040ebd05f96fd152ca8770

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