Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d319c426daec9ca…

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 01:59:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a0e7d9fb1674c0e86d16cf7719f8d272 SHA-1: 3e6e2289517b700d09849a21ba4c7bbd1a88a422 SHA-256: 0d319c426daec9cab476ce0eec97f804a9402a8eddd8b1b736e6b2de8e8f94b3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a 'free generator / game hack' to entice users. It contains multiple embedded URLs that redirect to malicious infrastructure, specifically targeting users interested in game-related exploits. The primary malicious URL identified is http://netcdn.tw/app/431946152/is-there-a-way-to-get-free-robux-game-hack, which is flagged as a known malicious redirector.

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/is-there-a-way-to-get-free-robux-game-hack In PDF document text
    • https://vieclamjapan.com/upload/files/how-to-hack-cbro-roblox-money_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-promo-codes-august-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-hacked-arcadeprehacks_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/minecraft-images-free_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-hack-stage-samim-sinim-youtube-aid_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/30-robux-free_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/hack-pour-roblox-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-free-boy-clothes_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-how-to-speed-hack-not-patched_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_off00002f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F10 22064 bytes
SHA-256: 666287a6656a2f1bfc796e8b57f5109e01783f3acfa3c98d23c7d171e4319379
font_01_sfnt_off00006047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6047 19364 bytes
SHA-256: ab7ba1a3ae240e4ee08c4c4f60ea65632c07d764c3c2f84f8903e8b00cabe730

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