Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd41bf6aea37bcc…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 09:26:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f54538107ec74365dd76a99faf395006 SHA-1: ef361bdeadb6dcad1c42527c1e128f5c5df3e908 SHA-256: cfd41bf6aea37bccd17c6837e50d5fbe23e345239d194b603352b9f8a8231f21
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains embedded URLs and a document body that attempts to lure users into downloading game-related cheats. The ML classifier strongly indicated maliciousness, and the presence of multiple external URIs suggests a download or redirection attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/robuxglobalcom-no-verification-game-hack
    • http://www.siahotel.com/userfiles/files/roblox-pet-simulator-hacks_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-mod-version-free-download_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-app-for-free-spins_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-free-spins-link-ios_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/password-free-roblox-accounts_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-free-link-2021_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-free-account_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/minecraft-font-free_GM479516143.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-free-spins-iphone-2021_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/free-robux-without-verify_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/roblox-army-free-robux_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/gamehunters-club-coin-master_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/clean-master-hack-coins_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdf
    • http://www.siahotel.com/userfiles/files/free-coins-coin-master-link_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004dbc.bin
8e7b9e679e31764aac3519cf3a89cfb113d8fef5ebe0410d18f1ba0d138aba0f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DBC 27212 bytes
font_01_sfnt_off00008ae8.bin
604842a08189fbdc46a09d68ab1d8addf33948d26a5d5cdcd7cf8fa5ff42efeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE8 19056 bytes