Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda71c6c6a5d7b7a…

MALICIOUS

PDF

48.3 KB Created: 2021-06-10 22:47:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b64911689dfe1cfb6b73c1a6499b49b SHA-1: ea72097fa31912badc20edaade993d011c0134f8 SHA-256: eda71c6c6a5d7b7aa6f1a431154f5a9563d1f1792223bbbec55b6ba9ff2aa97f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.tw/app/431946152/how-to-hack-speed-race-roblox-game-hack PDF link annotation
    • http://118.174.0.244/UserFiles/File/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfPDF link annotation
    • http://118.174.0.244/UserFiles/File/cone-master_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/roblox-r-cheats-2021_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-roblox-obbys-on-roblox_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000540d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x540D 26240 bytes
SHA-256: b443ba54b12753bfe412a45224c1a5edc7c0cef78d3b3bc9abd0fd876e4a8754
font_01_sfnt_off00008ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA0 2884 bytes
SHA-256: 6984e51a3e62e51efac31c93c091b12f82cb9392cf7c7ef80869a0a250296f07
font_02_sfnt_off00009892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9892 18696 bytes
SHA-256: 5ca5d89d47a55ca139fec26a0131ebaab6c45e9c3bbf9632b66b306ee8467865

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