Malicious PDF — malware analysis report

Static analysis result for SHA-256 044e36a19be9795f…

MALICIOUS

PDF

32.6 KB Created: 2021-06-28 08:21:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f612a326a93692f397bff3b6c085c225 SHA-1: 61c59aa2fbd70c8dd574744055e419312b72dc00 SHA-256: 044e36a19be9795f7974124336da41df5adf47167c7aed64066d5a981df2518a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a 'Click here to download' call-to-action, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs indicate a lure for free in-game items, likely leading to a malicious site or a further payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.co/app/431946152/free-face-in-roblox-game-hack
    • http://foo.com.tw/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdf
    • http://foo.com.tw/files/how-to-earn-free-robux_GM431946152.pdf
    • http://foo.com.tw/files/when-was-minecraft-free_GM479516143.pdf
    • http://foo.com.tw/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://foo.com.tw/files/robufree-club-free-robux_GM431946152.pdf
    • http://foo.com.tw/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://foo.com.tw/files/coin-master-free-spins-and-coins_GM406889139.pdf
    • http://foo.com.tw/files/veichle-simulator-roblox-hack_GM431946152.pdf
    • http://foo.com.tw/files/free-spins-on-coin-master-hack_GM406889139.pdf
    • http://foo.com.tw/files/daily-free-spins-coin-master-2021_GM406889139.pdf
    • http://foo.com.tw/files/how-to-get-free-robux-in-roblox-no-download_GM431946152.pdf
    • http://foo.com.tw/files/how-to-get-free-pet-in-pet-simulator-roblox_GM431946152.pdf
    • http://foo.com.tw/files/roblox-build-a-boat-hack-script_GM431946152.pdf
    • http://foo.com.tw/files/coin-master-hack-apk-online_GM406889139.pdf
    • http://foo.com.tw/files/free-robux-redeem-codes-2021_GM431946152.pdf
    • http://foo.com.tw/files/how-to-get-build-tools-on-roblox-cheating_GM431946152.pdf
    • http://foo.com.tw/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://foo.com.tw/files/robux-codes_GM431946152.pdf
    • http://foo.com.tw/files/robux-premium_GM431946152.pdf
    • http://foo.com.tw/files/coin-master-free-spins-today-39_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c2d.bin
9a3b5bd40f455843b209151165213d52c36851ddc8e114a07a10b16a92fe873a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2D 21528 bytes
font_01_sfnt_off00005b8f.bin
990c0bf9c78121b30ba13887c7673413c18f6c9cf86681e63828180f96052b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8F 18652 bytes

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