Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a971d92555039a…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 06:53:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3d6e86f180832632ea471c5126eda853 SHA-1: ab222f3ef9986d0c8fb422d8e86f99c5361dc0c3 SHA-256: 04a971d92555039a117c42d3f56da30144f20903a4eb644ee85d9f516ba1b9a6
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA or human verification prompt, a common tactic to trick users into interacting with malicious content. It also contains an embedded URI pointing to a URL that appears to be a lure for game-related cheats, likely a phishing or malware distribution site. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/406889139/how-to-get-free-coins-for-coin-master-game-hack
    • https://allpromise.com.tw/image/data/files/roblox-free-robux-website_GM431946152.pdf
    • https://allpromise.com.tw/image/data/files/minecraft-free-apk-download-016-0_GM479516143.pdf
    • https://allpromise.com.tw/image/data/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • https://allpromise.com.tw/image/data/files/free-robux-websites-no-human-verification_GM431946152.pdf
    • https://allpromise.com.tw/image/data/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://allpromise.com.tw/image/data/files/minecraft-complete-handbook_GM479516143.pdf
    • https://allpromise.com.tw/image/data/files/how-to-hack-coin-master_GM406889139.pdf
    • https://allpromise.com.tw/image/data/files/coin-master-card-hack-2021_GM406889139.pdf
    • https://allpromise.com.tw/image/data/files/roblox-lovenet_GM431946152.pdf
    • https://allpromise.com.tw/image/data/files/free-roblox-clothes_GM431946152.pdf
    • https://allpromise.com.tw/image/data/files/is-it-possible-to-hack-coin-master_GM406889139.pdf
    • https://allpromise.com.tw/image/data/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://allpromise.com.tw/image/data/files/hack-xp-net-coin-master_GM406889139.pdf
    • https://allpromise.com.tw/image/data/files/coin-master-spins-hack-iphone_GM406889139.pdf
    • https://allpromise.com.tw/image/data/files/roblox-hack-ga_GM431946152.pdf
    • https://allpromise.com.tw/image/data/files/robux-hack_GM431946152.pdf
    • https://allpromise.com.tw/image/data/files/coin-master-free-cards_GM406889139.pdf
    • https://allpromise.com.tw/image/data/files/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • https://allpromise.com.tw/image/data/files/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • https://allpromise.com.tw/image/data/files/coin-master-35-2-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005058.bin
d43b7d5e94afefd3af30dd9b628a72dce6d76ec7e4f5addf579b55b3a90addd7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5058 25072 bytes
font_01_sfnt_off00008908.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8908 2840 bytes
font_02_sfnt_off000092b9.bin
8c0da9336e983259e7b63ac0942506965b31c2e675ac4d9d442a950891c70db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B9 17872 bytes

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