Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad56484cb930509…

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 07:55:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2c76e973addf00ae05afdb54d3234bc7 SHA-1: aa99594598c43fcbdfb7a2c147dfb78c1cfd6528 SHA-256: 1ad56484cb930509e9a8890633f54cf9ab690917345968f6546636c9ed19ed08
160 Risk Score

Malware Insights

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

The PDF contains multiple links to websites offering free game hacks and currency, identified as malicious redirectors. The document body and heuristics indicate a lure for users to click these links, which likely leads to further malicious content or exploits. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/479516143/is-minecraft-realms-free-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/a-hack-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-but_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/safest-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-admin-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-insert_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/cheat-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/what-games-on-roblox-give-you-free-things_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/retail-tycoon-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/omplete-surveys-for-coin-master-free-spins_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_off00002f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F78 21780 bytes
SHA-256: b51e93d1894e7acd2f8237e411b9fff38f1cdd4db8963455ad52f8411ba052c8
font_01_sfnt_off00005f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6B 18192 bytes
SHA-256: 3fdf6c7900c76153a6c8ba7010afe065a028b37808fae2d556e2bfe86359ad32

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