Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bebaffc7970ff9c…

MALICIOUS

PDF

46.4 KB Created: 2021-06-07 22:26:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 523ced2aa30df405756da91ab43247b4 SHA-1: 10e94f25fd5e6c5760a334e45df9de574e05dda4 SHA-256: 3bebaffc7970ff9ccf014ef6e1791555e82770af2f5d98939e447dc7161ae3b4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that mimic advertisements for free in-game currency, aiming to trick users into downloading further malicious content. The heuristic findings indicate the presence of external URIs and a high ML score, suggesting malicious intent. The document also contains instructions to disable security software, a common tactic to facilitate malware execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.tw/app/431946152/roblox-do-you-want-free-robux-ad-game-hack
    • http://dygmotors.com.py/images/how-to-get-free-robux-no-survey_GM431946152.pdf
    • http://dygmotors.com.py/images/robux-free-robux_GM431946152.pdf
    • http://dygmotors.com.py/images/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdf
    • http://dygmotors.com.py/images/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://dygmotors.com.py/images/coin-master-free-spins-link-today_GM406889139.pdf
    • http://dygmotors.com.py/images/free-robux-hacker-us_GM431946152.pdf
    • http://dygmotors.com.py/images/minecraft-for-macbook-free_GM479516143.pdf
    • http://dygmotors.com.py/images/how-do-i-get-free-robux_GM431946152.pdf
    • http://dygmotors.com.py/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://dygmotors.com.py/images/roblox-imagine_GM431946152.pdf
    • http://dygmotors.com.py/images/free-robux-no-verification-needed_GM431946152.pdf
    • http://dygmotors.com.py/images/coin-master-free-blogspot_GM406889139.pdf
    • http://dygmotors.com.py/images/coin-master-games-hack_GM406889139.pdf
    • http://dygmotors.com.py/images/coin-master-free-spins-cheat-codes_GM406889139.pdf
    • http://dygmotors.com.py/images/free-minecraft-servers-to-join_GM479516143.pdf
    • http://dygmotors.com.py/images/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://dygmotors.com.py/images/spin-free-coin-master_GM406889139.pdf
    • http://dygmotors.com.py/images/compte-roblox-hack_GM431946152.pdf
    • http://dygmotors.com.py/images/roblox-free-download_GM431946152.pdf
    • http://dygmotors.com.py/images/100-free-tiktok-likes_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052bd.bin
90468d117f0972cf0308aa3db415c3f31aed2078284a37c33b4f43af54e15f0f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52BD 26932 bytes
font_01_sfnt_off0000903f.bin
b567d91e0bd8300cc73afcf4df6b65d137e09e9a653723c52330114cf6153f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x903F 19124 bytes

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