Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2c255da20796d2…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 20:43:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1b7bf042671f65515d4fcc1c0bd82b03 SHA-1: 168da234c8f544090bea0545d845be015fdb83fb SHA-256: 2c2c255da20796d2ff6f873b07d543f5334bb386bcf5c7348c7a12e0d5ed48a4
280 Risk Score

Malware Insights

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

This PDF document contains a launch action and multiple links to known malicious redirector infrastructure, specifically advertising "free generators" and "game hacks" for popular games. The document body also contains text that attempts to lure users into executing commands via clipboard operations or by referencing LOLBins, suggesting an attempt to trick users into running malicious code. The primary malicious activity observed is the redirection to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Launch action high PDF_LAUNCH
    PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
  • 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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/minecraft-rtx-download-free-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/do-you-want-free-robux-get-unlimited-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-roblox-tycoons-with-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-roblox-using-cmd_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/fly-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/get-free-robux_GM431946152.pdfIn macro / runtime command snippet
    • http://digilib.unbari.ac.id/repository/robux-gratuit-sans-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-hack-download-prison-life_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/cheat-engine-codes-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/launch-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/fIn macro / runtime command snippet
    • 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_off00003179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3179 23248 bytes
SHA-256: 6b277a6f2d4ed3c3aeef60e8f1bdcf20d05d416ed4689d4ff06108aebf0005ce
font_01_sfnt_off0000655a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655A 18788 bytes
SHA-256: 59fef1939a83a88b836790a1657827780524fe0f1793ff3d02d856994720603e

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