Malicious PDF — malware analysis report

Static analysis result for SHA-256 c937759b8bc4b209…

MALICIOUS

PDF

34.9 KB Created: 2021-07-19 08:18:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 742ce5f8cdb8667ca5e199b228d9147b SHA-1: a91bd09d510910476a9e4f83f9fc4a3873e983d7 SHA-256: c937759b8bc4b209586158020805f30dacd8719824938cc973c840d691c8b4f3
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a lure for 'free Robux' with a clear call-to-action to download, indicated by the 'SE_DOWNLOAD_BUTTON' heuristic and the embedded URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of multiple suspicious URLs suggests a phishing or scam attempt, likely leading to a malicious download or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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 http://netcdn.tw/app/431946152/free-robux-kid-friendly-no-human-verification-game-hack
    • https://magistrinfo.ru/images/free-tiktok-bots_GM835599320.pdf
    • https://magistrinfo.ru/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://magistrinfo.ru/images/minecraft-account-hacked_GM479516143.pdf
    • https://magistrinfo.ru/images/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • https://magistrinfo.ru/images/minecraft-for-free-on-phone_GM479516143.pdf
    • https://magistrinfo.ru/images/will-minecraft-dungeons-be-free_GM479516143.pdf
    • https://magistrinfo.ru/images/free-minecraft-premium-account_GM479516143.pdf
    • https://magistrinfo.ru/images/how-to-earn-free-robux_GM431946152.pdf
    • https://magistrinfo.ru/images/free-views-on-tiktok_GM835599320.pdf
    • https://magistrinfo.ru/images/coin-master-free-spins-daily_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002c7a.bin
19c5813583cbbc6f6b84da50704814d07d86cc3e54f7dd3e695ff27c31a4c8b1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C7A 23924 bytes
font_01_sfnt_off000062ff.bin
c5aca30ee482ab97ef5a663076df94f5e48f22263153ac395a5dfe60051950ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FF 19476 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.