Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e42b0e118476bf3…

MALICIOUS

PDF

45.2 KB Created: 2021-05-16 21:47:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 18c9f61d0bae189b9e8eeb3afa73ead5 SHA-1: 0862fc6f2606d477d9ef796eaf2b192b0ff8b360 SHA-256: 0e42b0e118476bf3498bae649bf59dd91df00e9ed9be952cd6a257548981d98d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a 'download' lure, suggesting a phishing or scam attempt. The primary URL points to a guide on changing Roblox usernames, likely a pretext to direct users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are related to game hacks and free items, further supporting the scam or phishing vector.

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 https://netcdn.xyz/app/431946152/how-to-change-your-username-on-roblox-for-free-game-hack
    • https://smark.com.tw/image/data/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
    • https://smark.com.tw/image/data/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://smark.com.tw/image/data/files/minecraft-games-to-play-for-free_GM479516143.pdf
    • https://smark.com.tw/image/data/files/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • https://smark.com.tw/image/data/files/roblox-ftw_GM431946152.pdf
    • https://smark.com.tw/image/data/files/coin-master-free-spins-promo-code_GM406889139.pdf
    • https://smark.com.tw/image/data/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • https://smark.com.tw/image/data/files/how-to-hack-coin-master_GM406889139.pdf
    • https://smark.com.tw/image/data/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdf
    • https://smark.com.tw/image/data/files/robux-free-online_GM431946152.pdf
    • https://smark.com.tw/image/data/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://smark.com.tw/image/data/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • https://smark.com.tw/image/data/files/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • https://smark.com.tw/image/data/files/sites-to-get-free-robux_GM431946152.pdf
    • https://smark.com.tw/image/data/files/coin-master-hack-pc-free_GM406889139.pdf
    • https://smark.com.tw/image/data/files/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • https://smark.com.tw/image/data/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdf
    • https://smark.com.tw/image/data/files/coin-master-hack-https-coinms-net_GM406889139.pdf
    • https://smark.com.tw/image/data/files/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • https://smark.com.tw/image/data/files/how-to-get-800-robux-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a73.bin
c4e2544a18051888c4e6478d8ca8e2b476b31af41d725b525da1a94555de7264
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A73 29100 bytes
font_01_sfnt_off00008aff.bin
93794ea5a6c5acfa8b9ea336c7fa02a00f4c27ab4f9922f3137d25115e5793d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFF 19540 bytes