Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1ea25c4da8b360…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 10:10:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a585fc388b2ec702ecd346afeb5618e4 SHA-1: 18c47a7ff1e0a0529823e5d131cdeb74a867f32c SHA-256: ed1ea25c4da8b360c3ba1c2c269e40191b85e30a8f14cd27373849929c3cd111
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure appears to be a 'Coin Master' hack, directing users to http://netcdn.tw/app/406889139/haktuts-coin-master-free-daily-spins-game-hack. This infrastructure likely serves as a gateway to further malicious content or exploits, aiming to trick users into downloading malware or compromising their accounts. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or social engineering attack.

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/406889139/haktuts-coin-master-free-daily-spins-game-hack In PDF document text
    • http://suaedy-library.net/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/como-hacer-hacker-en-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/proxo-hack-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/allintittlefree-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-roblox-to-get-builders-club_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/robux-hack-2p_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
stream_002_off000030d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30D2 22812 bytes
SHA-256: 84353ba07ff6d9d9e9ed363f3c8c395a79eb8a434a28c1bf1b983161016be01a
font_01_sfnt_off000063e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E9 18904 bytes
SHA-256: b7f24531c88ef09d261a29b7b412295c42d9b915df36cfe91f545608b0580658

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