Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e055b365bdb90b2…

MALICIOUS

PDF

33.4 KB Created: 2021-07-04 08:52:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d7b1ca1d266e76b355d8eb63ac7e23b2 SHA-1: 868ff76fd2a8a426f179ceee5288d3a2eb263125 SHA-256: 2e055b365bdb90b220db540d121044dba07cd4dca2cbd6af263a060f7d6517df
82 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and text lures related to game hacks and cheats, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The presence of external URIs and the overall structure indicate an attempt to redirect users to malicious sites, likely for the purpose of downloading further malware or engaging in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.tw/app/406889139/free-hacks-for-coin-master-game-hack
    • http://cleansui.com.tw/image/data/files/coin-master-free-coins-app_GM406889139.pdf
    • https://cleansui.com.tw/image/data/files/coin-master-free-link-spin_GM406889139.pdf
    • http://cleansui.com.tw/image/data/files/hacking-into-a-roblox-account2021_GM431946152.pdf
    • https://cleansui.com.tw/image/data/files/roblox-jailbreak-money-cheat_GM431946152.pdf
    • https://cleansui.com.tw/image/data/files/free-robux-on-pc_GM431946152.pdf
    • https://cleansui.com.tw/image/data/files/coin-master-cheat-to-get-free-spins_GM406889139.pdf
    • http://cleansui.com.tw/image/data/files/are-free-robux-sites-safe_GM431946152.pdf
    • https://cleansui.com.tw/image/data/files/minecraft-free-app_GM479516143.pdf
    • https://cleansui.com.tw/image/data/files/free-custom-minecraft-skins_GM479516143.pdf
    • https://cleansui.com.tw/image/data/files/daily-free-spin-link-for-coin-master_GM406889139.pdf
    • http://cleansui.com.tw/image/data/files/roblox-the-rake-hack-script_GM431946152.pdf
    • http://cleansui.com.tw/image/data/files/coin-master-rewards_GM406889139.pdf
    • https://cleansui.com.tw/image/data/files/free-minecraft-java-server_GM479516143.pdf
    • https://cleansui.com.tw/image/data/files/coin-master-fb-free-spins-link_GM406889139.pdf
    • http://cleansui.com.tw/image/data/files/robux-hack-fake-credit-card_GM431946152.pdf
    • https://cleansui.com.tw/image/data/files/how-to-actually-get-free-robux_GM431946152.pdf
    • http://cleansui.com.tw/image/data/files/how-to-hack-someone-on-roblox_GM431946152.pdf
    • https://cleansui.com.tw/image/data/files/hacks-of-roblox-for-cmds_GM431946152.pdf
    • https://cleansui.com.tw/image/data/files/roblox-i-got-hacked-again_GM431946152.pdf
    • https://cleansui.com.tw/image/data/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • https://cleansui.com.tw/image/data/file
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e77.bin
6ccde7ef22e6c6994395f3a92afc0d06fbc642ade20539989e68b61ae9c40431
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E77 22432 bytes
font_01_sfnt_off0000605f.bin
1e436942c22cf5f1ddb993b5625de9063034e514cb54256dfb31bec93a9ee0e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 18168 bytes