Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3116d64eeb34386…

MALICIOUS

PDF

36.4 KB Created: 2021-06-28 14:32:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6ac17e409383204e74d1831e6ab8749f SHA-1: 1af38374df27aff33bdafbea302a96a3e5bf6938 SHA-256: a3116d64eeb343865725430f755c123febbba535fe78d73da121c11d2275f9ed
160 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks and redirects to known malicious infrastructure. The embedded URL `http://netcdn.co/app/431946152/what-cheats-can-you-do-to-get-robux-fast-game-hack` is flagged as a malicious redirector. This suggests the document is part of a phishing campaign designed to trick users into visiting potentially harmful sites.

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/what-cheats-can-you-do-to-get-robux-fast-game-hack In PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/i-will-draw-your-roblox-character-for-free_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/roblox-robux-generator-tool-2021-roblox-robux-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/hack-roblox-exploit-omgexploit_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/money-hack-sur-sunset-city-roblox_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/roblox-hack-flood-escape-2_GM431946152.pdfIn PDF document text
    • https://www.titastar.com/uploaded_files/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.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_off000034a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34A0 22776 bytes
SHA-256: 1899450516a91a104b356456570ecaa9cb3a459509817495aad0af91d9c8c7aa
font_01_sfnt_off000067dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DC 19512 bytes
SHA-256: 046663cae73474540bd7440a1f6248f975656bd8ce1caa3d75c1ea4125f3a7ac

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