Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc97dd8610d817b1…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 22:01:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b1cc06a63c996d3e4b6c29928df88cce SHA-1: 7ee25fa819f9af08e8bcfffc81542ac2d598a622 SHA-256: fc97dd8610d817b19cfc9cc638bbffc1a8ba140ff7640aadfb23a387688c127a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and followers to trick users into clicking a link. The primary link, http://netcdn.tw/app/835599320/get-tiktok-followers-free-game-hack, is identified as a malicious redirector. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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/835599320/get-tiktok-followers-free-game-hack In PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-tiktok-followers-in-5-minutes_GM835599320.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-dresses-for-roblox_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/pokemon-go-joystick-free-download_GM1094591345.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-roblox-autofram_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/anonymous-hacker-script-roblox_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/weird-roblox_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-robux-bloxawards_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/roblox-boxing-simulator-2-hack-strength-script_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/5-hacker-fampsos-roblox_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/free-robux-com-hack_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/cheat-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://kaospartai-murah.com/ckfinder/userfiles/files/roblox-city-of-london-money-hack_GM431946152.pdfIn PDF document text
    • http://www.tiktok.com/fypIn 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_off0000307a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307A 22800 bytes
SHA-256: 5067d72400d6fcd482eaa3ab264422c50f11bd2633e9d0639f890a3167794039
font_01_sfnt_off0000637a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637A 18208 bytes
SHA-256: 2c913cd2b1a0bf54f87f8719ad814203ec2f1a1a3b8e3f6b6a76b442a86e84f4

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