Malicious PDF — malware analysis report

Static analysis result for SHA-256 a000d63979a7f3d6…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 09:13:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1c8e278b1c219eb46312e72981d40c10 SHA-1: 0fce712fe29af6fad277ca1730343d949967d576 SHA-256: a000d63979a7f3d6c39ac083d12091d3d6be42fd2d4a367e263ad285cebead51
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites promising free game currency or hacks, indicating a lure-based attack. The document body and heuristics confirm the intent to redirect users to potentially harmful content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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/431946152/withdraw-robux-game-hack In PDF document text
    • http://wwic.wales/uploads/files/files/how-to-get-free-robux-in-the-game_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-2021-august-codes_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-plain-yellow-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/how-to-get-free-robux-roblox-2021_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/how-to-hack-your-robux-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/robux_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/spin-coin_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/cheats-for-gta-5-on-roblox_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-payouts_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-roblox-promo-codes-march-21-2021-twitter_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/how-to-get-free-robux-on-roblox_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_off00002f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F01 22544 bytes
SHA-256: 8b9c9830089ca887cd8048517ae0f2e9381c363fc399b8f4bfa9b787948b4f06
font_01_sfnt_off00006159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6159 19476 bytes
SHA-256: 88cb7ac3c962ee5f5b0cbbfc398b530c92eb9f3e646e2d9d69c1876f43b6d899

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