Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ac70e6c2617b12…

MALICIOUS

PDF

34.6 KB Created: 2021-06-17 16:51:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: edcab7faeeca116bce96404aeaf07e20 SHA-1: ad08d311e3c4a5c2a2c5a457d2580a2dd1c69e18 SHA-256: 38ac70e6c2617b12d12cf4171d2b1afd1786fca2d102c0dc82e6b86a3926da00
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that point to a known malicious redirector infrastructure, specifically designed to lure users with promises of game hacks and free currency. The ML classifier strongly indicates maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary URL, http://netcdn.co/app/431946152/code-for-free-robux-2021-game-hack, is the most critical IOC, likely serving as the initial entry point to a malicious payload or phishing site.

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.co/app/431946152/code-for-free-robux-2021-game-hack In PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/how-to-open-proxo-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/www-robux-us_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/pubg-uc-easypaisa_GM1330123889.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/village-coin_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/coin-spin_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/download-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/roblox-life-free-robux_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_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_off00002eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB4 22800 bytes
SHA-256: 9b8ef6a54a580db3e02ff45741125aba1f8fba4e014d2bbf8cfc3bec1505d321
font_01_sfnt_off000061f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F4 19104 bytes
SHA-256: e32e31010ad19494af0555a90bb26762e4e2f4cae9155befbd7c9e7c12601aed

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