Malicious PDF — malware analysis report

Static analysis result for SHA-256 4372a8ea9c3f4e94…

MALICIOUS

PDF

41.0 KB Created: 2021-06-23 06:57:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2979a600d5269c2c85b49aab867fe7ca SHA-1: f3758e21505447627f78fd4e01eef2bed543bfe8 SHA-256: 4372a8ea9c3f4e9449d9b619081456df4d3da276783827319e810708c40c3df2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of free game hacks and in-game currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or exploits. The document body and embedded URLs strongly suggest a social engineering tactic to drive users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/account-hacking-software-roblox-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-codes-2021-august_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/gun-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hacks-for-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-for-pc-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-pant-templates_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-driveblox-unlimited-money-cheat_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000472a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x472A 23192 bytes
SHA-256: 8101cdcd9a1a65b300beb97d6117b3c54d6be6650227d32ebb2ccf3e4f64af01
font_01_sfnt_off00007b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B76 19184 bytes
SHA-256: 34d348d739b338fb355ba2fff7a18dbb6e676939599e24dddfb40db24b278bad

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