Malicious PDF — malware analysis report

Static analysis result for SHA-256 29aac6864ae6a94e…

MALICIOUS

PDF

35.4 KB Created: 2021-07-01 15:20:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 01660a06d40f229c931ede0ed3a412ae SHA-1: 13e4801f03b16f8c70ec8b142ac2323fc1126e7c SHA-256: 29aac6864ae6a94e87a30017ef3ea784c28322e03eb56931d9d9f5ca3d3f0fa7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as generators for popular games like Roblox. The document body explicitly mentions 'A Tool To Get Free In Roblox Purchases' and includes a primary URL that is flagged as malicious. This suggests a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

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.co/app/431946152/a-tool-to-get-free-in-roblox-purchases-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-send-a-trade-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/pubg-uc-app_GM1330123889.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-like-bots_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-promo-code-hack-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-4game-club-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-counter-blox-credit-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/tiktok-free-dance_GM835599320.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-full-throttle-money-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-2021-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-cheatcode-madpaintball_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_off00003233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3233 22672 bytes
SHA-256: 2051c09cd4e37e665548099ff0c15265ab0384673e7fc955c7c0650e48925f6a
font_01_sfnt_off000064fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FC 19216 bytes
SHA-256: 53013c834f88238f7a078837a563a0c224bc24951340ef78b99dff9aea454a23

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