Malicious PDF — malware analysis report

Static analysis result for SHA-256 288585a390870af1…

MALICIOUS

PDF

42.3 KB Created: 2021-05-11 14:20:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ffa1f6c049e284c4a0c0f098c513fa84 SHA-1: ed55cea947b5cc662f75b9f4483abd3d7e79dd30 SHA-256: 288585a390870af1e5d74a593df86c73a53a66244c7460be7317536906de241a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a prominent external URI pointing to sites offering free in-game currency or items, which is a common lure for malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing users to decrypt a payload, further indicating a malicious intent to deliver a second-stage download. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-get-free-skins-in-minecraft-game-hack
    • http://samfora.de/images/free-minecraft-severs_GM479516143.pdf
    • http://samfora.de/images/coin-master-daily-free-spins-link-blogspot_GM406889139.pdf
    • http://samfora.de/images/coin-and-spin-link_GM406889139.pdf
    • http://samfora.de/images/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://samfora.de/images/minecraft-pe-hacked-client-download_GM479516143.pdf
    • http://samfora.de/images/coin-master-free-spins-instagram_GM406889139.pdf
    • http://samfora.de/images/robux-miner_GM431946152.pdf
    • http://samfora.de/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://samfora.de/images/easy-robux-generator_GM431946152.pdf
    • http://samfora.de/images/how-to-actually-get-free-robux_GM431946152.pdf
    • http://samfora.de/images/coin-master-game-free_GM406889139.pdf
    • http://samfora.de/images/minecraft-windows-10-edition-free-download_GM479516143.pdf
    • http://samfora.de/images/coin-master-free-spin-whatsapp-group_GM406889139.pdf
    • http://samfora.de/images/roblox-tix-generator_GM431946152.pdf
    • http://samfora.de/images/mcpe-116_GM479516143.pdf
    • http://samfora.de/images/spin-coin-master_GM406889139.pdf
    • http://samfora.de/images/coin-master-hack-android-root_GM406889139.pdf
    • http://samfora.de/images/coin-master-ios-gods-hack_GM406889139.pdf
    • http://samfora.de/images/game-toolbox_GM479516143.pdf
    • http://samfora.de/images/coin-master-hack-xyz-download-free_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c32.bin
9d6a082ac69bdd008a669bf4e59e7283a41356be55dc8ebc00f4be45b04f7da0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C32 25028 bytes
font_01_sfnt_off000083f0.bin
6cc59c28d5557832b1af72f7b0f143d8adff3a85e9aacd177c0586c4e7a11f45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F0 18044 bytes

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