Malicious PDF — malware analysis report

Static analysis result for SHA-256 03138068b90a73ac…

MALICIOUS

PDF

32.8 KB Created: 2021-07-19 18:43:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2b2c18194fdb3a47e681daac96f811a9 SHA-1: 7921d13704e4498a0bcd235d13dbcf2934273582 SHA-256: 03138068b90a73ac7856366a1977e3eb3d6f3b980036a48ffed24d3eda865269
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains lures related to free game items and exploits, directing users to download content from suspicious URLs. The presence of embedded URLs and a call-to-action button suggests an attempt to trick the user into downloading a malicious payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/406889139/free-coins-for-coin-master-game-hack
    • https://osk-sibir.ru/images/minecraft-dungeons-free-download_GM479516143.pdf
    • https://osk-sibir.ru/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://osk-sibir.ru/images/adopt-me-roblox-hacks_GM431946152.pdf
    • https://osk-sibir.ru/images/free-mods-for-minecraft-pe_GM479516143.pdf
    • https://osk-sibir.ru/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdf
    • https://osk-sibir.ru/images/free-minecraft-server_GM479516143.pdf
    • https://osk-sibir.ru/images/free-robux-co_GM431946152.pdf
    • https://osk-sibir.ru/images/free-spins-coin-master-2021_GM406889139.pdf
    • https://osk-sibir.ru/images/is-minecraft-bedrock-edition-free_GM479516143.pdf
    • https://osk-sibir.ru/images/blox-fish-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d48.bin
02a1e59e2a1b9537074384f006fcda864a8b6f53d1bed133c7f785488d495f94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D48 22632 bytes
font_01_sfnt_off00005fec.bin
fd51fa1b849cf95139b510f282bcd47e41e352499df1938c7ca947a320e7b070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEC 17712 bytes

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