Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8dc8da569faf73…

MALICIOUS

PDF

44.1 KB Created: 2021-06-11 01:07:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bae57259dceeb0dd242bc3b061dd602c SHA-1: 53f7e5d91c594cc6bb1ef25aa4c6616d1215bce5 SHA-256: 6d8dc8da569faf7341ecf75aed0e88ef1452d13412c7deb968aec01a4ea26a2a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains links to known malicious redirectors, specifically advertising free game hacks and in-game currency generators. It also contains a heuristic indicating a lure to execute commands via the clipboard, suggesting a multi-stage attack. The document body and embedded URLs reinforce the theme of exploiting user interest in free game-related items to drive malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-online-robux-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/any-free-roblox-exploits-2021-reddit_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hack-roblox-jailbreack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-gui-script-pastebin_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-animation-roblox-june_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-for-watching-ads_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/easy-robux-hack-on-android_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_off00005115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5115 24800 bytes
SHA-256: 0a4dfcab3c759e8821ad4c51e93b30c3744a3b1191fe4909b96d618364cecf9c
font_01_sfnt_off00008a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A20 18208 bytes
SHA-256: d500cf3c2e8c8d2fe217115f1f81a8331ef3f09811b13cf6142248c93f2ad2c5

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