Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d46139480eaf7b…

MALICIOUS

PDF

36.4 KB Created: 2021-05-22 18:05:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b5d16d7f1fff3303fbc8e405367fb9e9 SHA-1: 426ce957fb710150ad38a88c7da3b34a9d9cc7b5 SHA-256: b0d46139480eaf7bf3ff035d7c44155bff6ac112f9d3dae5c0cb8e8e7338ae71
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document that contains embedded URLs and a lure to execute commands via the clipboard. The ML classifier also flagged it as malicious. The document body, though partially garbled, suggests a lure related to 'Minecraft Hacker Skin' and includes a call to action to access a generator, likely a pretext to trick users into running malicious code. The presence of multiple suspicious URLs indicates a potential download or redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-hacker-skin-game-hack PDF link annotation
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000357b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x357B 25464 bytes
SHA-256: 47814fc9111a7ad229405f514f49b5ee25242627d32e45a816fa864e3dd59c81
font_01_sfnt_off00006ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 17740 bytes
SHA-256: 91fe2762de83ff68ec278d498415159af7d0ffb5c1d0151dc7294afbb77550eb

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