Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0f023215034342…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 10:22:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 574391b6ecd0d5b2f97b65f9e4a303a1 SHA-1: 748b70e2372e299d55ace80c6c00b062140ac89e SHA-256: ec0f023215034342000481f497fa046d0a86e3bef184d6b98cc5715a603e4493
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures for popular games. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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/coin-master-online-free-spin-game-hack In PDF document text
    • http://library.atim.ac.id/repository/cheat-roblox-jaibrach_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-scams-how-to-stop-them_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-install-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-cool-things-in-roblox-that-charecters-played_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-2021-without-contacting_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-script-tampermonkey-legit-works-no-scam-100_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/best-hack-guis-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/get-free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hack-unlimited-jump_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-guest-body-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-hole-in-the-wall-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-adopt-me-free-pet-codes_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-speed-hack-cheat-engine-vermillion_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_off000030e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E3 22940 bytes
SHA-256: 98a33d411f4e783eb0ed01e276f78beb1699a6fc6401178ecfcb5aea801955a6
font_01_sfnt_off00006474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6474 18248 bytes
SHA-256: 219756382ff6256e60ec1326728dd0e07af79f7e300a248e9a054b936f27f57f

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