Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2325e6932fb346…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 07:52:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6e58a5c094b47ec1f331adb9fd52bd3d SHA-1: 1d55534b665d8633328437e80ee3f40e2b5130a4 SHA-256: af2325e6932fb346f08574efe92c8089555b21f561d50b19c87386583bca6b25
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that promise free in-game items or currency. The primary lure, 'free-robux-without-human-verification-on-pc-game-hack', directs to a suspicious URL. This suggests a phishing or scam attempt designed to lead users to potentially malicious websites.

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/free-robux-without-human-verification-on-pc-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-hats-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/comment-hacker-roblox-robux-tuto-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-roblox-link-mad-city_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/what-is-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coins-coin-master-link_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_off00003045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3045 22804 bytes
SHA-256: e227127e4b587eea35a4c00d55dd61ae46e7b75861b201949ccb8406878c4b5e
font_01_sfnt_off0000637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 19852 bytes
SHA-256: 4ddcee3a5d32ef4986ec232e7cd6182bf4afc05f5e95a7b581997a104b45714e

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