Malicious PDF — malware analysis report

Static analysis result for SHA-256 52bc4b88867dd462…

MALICIOUS

PDF

34.3 KB Created: 2021-06-19 05:24:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7a6cef0bb8c69453fe4d41a9fbac71c9 SHA-1: 4acc0e06c3dd5a542bbadb97bcfe9aba18cd782a SHA-256: 52bc4b88867dd462716f27b7324118c1d07b9df86f20d93fcb6edd13d775897b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful websites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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-obby-2021-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-rocitizens-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-jailbreak-2021-btools-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/fnaf-roblox-fread-bear_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/where-is-the-hacking-station-clone-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hack-fake-credit-card_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/haktuts-coin-master-free-daily-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_off0000303c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303C 21736 bytes
SHA-256: 16d1273d6710b98935ed5bd6135600b0859c591540207541715f4f3fdbc03fff
font_01_sfnt_off0000601a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601A 19300 bytes
SHA-256: b480e57f7d5b556cc4767b9b3cb0f03098c0ecbb180f8a5a4d5272ae73f4a644

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