Malicious PDF — malware analysis report

Static analysis result for SHA-256 360c0a3eef8ff87c…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 13:40:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e55156d31b381952c1f71cd9b2d0e1a0 SHA-1: 5ec725ca41ad04323d6c64eee7aa85e712da67e4 SHA-256: 360c0a3eef8ff87ca06df88b7ab17ba326465994f0daa7fdb86fd7435b0c436c
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically disguised as game hacks or generators. The document also instructs the user to copy/paste content into a shell, indicating an attempt to execute commands. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to malicious infrastructure and potentially execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://netcdn.online/app/479516143/game-toolbox-game-hack In PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-hack-lab-experiment-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/tiktok-free-app-download_GM835599320.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://www.youtIn 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
stream_004_off0000541c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x541C 30136 bytes
SHA-256: 7106d48c13b7371d9447d07c2b3f95d233fdd1de8758bbedaabc40c2d4c7c45a
font_01_sfnt_off00009883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9883 18188 bytes
SHA-256: cc5ae47c5e11d0f88656729761c41b71782f27a7f5283d48097ca54d7cfe7015

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