Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d2d9ed79b4b530…

MALICIOUS

PDF

46.6 KB Created: 2021-06-09 12:59:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0dcb510346c70f1d71c8ea87397adfce SHA-1: 169890bf133281501f275d0a45844f00133b4234 SHA-256: e4d2d9ed79b4b530a1dc15255b3372e2374167f19bbdd3558f967910e5606748
82 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 0.9832

Heuristics 4

  • 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.
  • 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-any-roblox-account-game-hack PDF link annotation
    • http://atiltd.com.tw/upload/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-free-robux-free-robux-tips_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/best-roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/coin-master-free-gifts_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
stream_004_off00004e52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E52 29352 bytes
SHA-256: 13261369f9cace42acbad490a5ec0c6ad87b94ca2a8daab9d05c997423b16d33
font_01_sfnt_off00009220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9220 18772 bytes
SHA-256: d5ac01ba848f85c7af00746e0b4ab9643e0d1d2f53353368de6e0e250a854553

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