Malicious PDF — malware analysis report

Static analysis result for SHA-256 c098686dd5642f9a…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 02:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0c203d168ef344fb2088ed22db4f4cce SHA-1: 1181fcbea67f2991f6973892a9c96415c86ddc90 SHA-256: c098686dd5642f9a8ad071f79e7b81e659154fb1ff90e9b4f790900655b0da45
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, specifically advertising free Robux and game hacks to lure victims. The primary redirector URL is http://netcdn.co/app/431946152/unpatchable-free-robux-for-roblox-game-hack, which is known to host malicious content. No scripts were extracted from this sample, but the embedded URLs and the document's content strongly indicate a phishing or scam attempt.

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/unpatchable-free-robux-for-roblox-game-hack In PDF document text
    • https://fordogtrainers.mx:443/images/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-twitter_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/download-roblox-hacking-software_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-co_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_off00002efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFC 22560 bytes
SHA-256: 5ca69cee8e352c68a3bacfd33cac0cfd9efa5be7864a7071bdfdb7c7b21e61b8
font_01_sfnt_off0000614b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 19236 bytes
SHA-256: 24271b310b33de8fad81cd6b52991e6b5cf6c2a0b4ff289dd767d1a2b972c8b4

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