Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee02fddbcd0cb701…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 22:55:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 542e93aff6df268ff45872fe77e8b9b5 SHA-1: 6f4af3b07c811fc471edfe3d239ce2bdfb61e727 SHA-256: ee02fddbcd0cb7013af9c1332b5cfe4d5c195cecf4a79783ff5f3406c1aae12a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF files related to game hacks and cheats. The primary URL, http://netcdn.co/app/431946152/did-roblox-block-cheat-engine-game-hack, is flagged as a lure for game hacks. This suggests the document is part of a link farm or phishing campaign designed to drive traffic to potentially malicious sites or downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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 http://netcdn.co/app/431946152/did-roblox-block-cheat-engine-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-roblox-one-piece-open-seas-prealpha-read-desc_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/bp-to-uc-pubg_GM1330123889.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-tiktok-username-and-password_GM835599320.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-dungeon-quest-lvl-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/pokemon-go-free-event_GM1094591345.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_off0000310b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310B 21736 bytes
SHA-256: bdb34f37ce2e7169bca7ed8e1b83a5bd7efdee019d2d4e8c313edbce9e189c91
font_01_sfnt_off00006108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6108 19388 bytes
SHA-256: da9f0531907ce5d382651bda045ca604c6c3ac1eb24962d18f0af9bd2a287c63

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