Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2f90ac6958998b…

MALICIOUS

PDF

35.4 KB Created: 2021-07-01 13:15:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5e6ddeac40fcef42330d3c9c640d3b3f SHA-1: 4da93f559b5f1a77761ba76ed93e730d1c88d04f SHA-256: 6f2f90ac6958998b6bcce3da98302c4de54e4e450b6ec82404b56e446c653c6e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that promise free game hacks and currency, such as 'free-synapse-x-roblox-game-hack'. These links are hosted on known malicious redirector infrastructure, indicating a high likelihood of leading to phishing pages or malware downloads. The ML classifier also strongly flagged this PDF as malicious.

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-synapse-x-roblox-game-hack In PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-jailbreak-hack-teleport_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-cheat-engine-aimbot_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-download-free-latest-version_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/gift-card-hot-generator-hack-robux-codes-hot_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/are-free-robux-websites-real_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-make-free-pants-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-free-robux-lohith-gaming_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/hack-on-roblox-to-not-die-in-obby_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-gear-on-the-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-robux-game-that-showed-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-strucid-fortnite-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-robux-via-promo-codes-2021_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_off00003438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3438 22260 bytes
SHA-256: 614ebbb619fa16541080c76d6c96a620bff97de1b407603c1e4c62cfa77a1360
font_01_sfnt_off00006587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6587 19008 bytes
SHA-256: 2d3cb43ecc27cefdff8cc8ae98a242b41423cd08160b133c48e9c5867efe4932

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