Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dbe2697cb50da8…

MALICIOUS

PDF

46.1 KB Created: 2021-05-13 16:15:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a8a6c7657f7c15531b5ad58ad9427338 SHA-1: 551f8e29d19c228321d007828f8cca3bd193ecf5 SHA-256: 63dbe2697cb50da8d4b15f5891c029ceaf1fd9b77dcc0b304ae0090e5f61dd2b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The document contains a lure to copy and paste content into a shell, which is a common technique for executing malicious commands. The embedded URL points to a resource that likely serves as a download for a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.xyz/app/479516143/minecraft-free-school-game-hack
    • http://hemmet-strand.dk/images/coin-master-cards-hack-2021_GM406889139.pdf
    • http://hemmet-strand.dk/images/how-to-get-free-roblox_GM431946152.pdf
    • http://hemmet-strand.dk/images/get-free-robux-no-verification_GM431946152.pdf
    • http://hemmet-strand.dk/images/coin-master-free-link-facebook_GM406889139.pdf
    • http://hemmet-strand.dk/images/minecraft-hacks-wurst_GM479516143.pdf
    • http://hemmet-strand.dk/images/coin-master-heaven-free-spins-and-coins_GM406889139.pdf
    • http://hemmet-strand.dk/images/coin-master-spins-free-2021_GM406889139.pdf
    • http://hemmet-strand.dk/images/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://hemmet-strand.dk/images/spins-coin-master_GM406889139.pdf
    • http://hemmet-strand.dk/images/robux-com-free_GM431946152.pdf
    • http://hemmet-strand.dk/images/coin-master-spin-hack-no-human-verification_GM406889139.pdf
    • http://hemmet-strand.dk/images/roblox-survey-for-robux_GM431946152.pdf
    • http://hemmet-strand.dk/images/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdf
    • http://hemmet-strand.dk/images/coin-master-free-cards_GM406889139.pdf
    • http://hemmet-strand.dk/images/www-coin-master_GM406889139.pdf
    • http://hemmet-strand.dk/images/minecraft-life-hacks_GM479516143.pdf
    • http://hemmet-strand.dk/images/coinmasterfreespins_GM406889139.pdf
    • http://hemmet-strand.dk/images/how-to-get-free-robux-on-pc_GM431946152.pdf
    • http://hemmet-strand.dk/images/minecraft-education-free_GM479516143.pdf
    • http://hemmet-strand.dk/images/free-coin-master-gifts_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004dbc.bin
d26beb78e8d6ee31032228c697035c7ebeea4214efe6aa8242fb76a4dffcac4f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DBC 25888 bytes
font_01_sfnt_off000088a9.bin
dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A9 3056 bytes
font_02_sfnt_off0000931b.bin
3306dbe29cd5a9252a7c23216fa618f4152d1ef882dd12fcaa7c7369e283e77f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x931B 17952 bytes

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