Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28f99e7257f7452…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 06:03:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f170c990a07100828295004c8e147d08 SHA-1: 6be219391c1111fb817ec8995d58d35f7fb67e5d SHA-256: f28f99e7257f745286086267121144a8fd970ccaa7ac02f64678a2b14bd57715
62 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Coin Master' free spins, directing users to a URL that likely hosts a malicious application. The presence of a callback lure and a high ML classifier score further indicate malicious intent. The document's content and embedded URLs suggest a phishing or scam campaign aimed at tricking users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/406889139/coin-master-15-free-spin-link-today-game-hack
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-hack-app-for-iphone_GM406889139.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/websites-for-robux_GM431946152.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-followers-on-tiktok_GM835599320.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/roblox-catalog-free_GM431946152.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/pokemon-lets-go-free_GM1094591345.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/how-to-use-wurst_GM479516143.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-hack-2021_GM431946152.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/minecraft-auto-miner-hack_GM479516143.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/but-link-says-free-robux_GM431946152.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/http-coin-master-hack-club_GM406889139.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-without-any-verification_GM431946152.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/get-free-coin-master_GM406889139.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-daily-free-spins_GM406889139.pdf
    • https://www.orbai.ai/uploaded_files/userfiles/files/best-minecraft-hacked-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052c8.bin
f908f25ac466f9ed85c8940007a4bdc4f4c872adb6c00964490e41fe76ed0c24
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C8 28916 bytes
font_01_sfnt_off0000921c.bin
5b53a5b683b77cc6f0f815c556bf9926b59998be6e817bd3b756384118128b65
pdf-font-stream PDF embedded font (sfnt) at offset 0x921C 18652 bytes