Malicious PDF — malware analysis report

Static analysis result for SHA-256 533059e59c4b380c…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 14:09:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3dbe8bcc0e390661e853d5e9e52fe30c SHA-1: 3ae2ded5f7849bf5a00686fb1fac184cd5d5e966 SHA-256: 533059e59c4b380cb0890f7f80dbdfe85371a65e80e5c02a9f6f0a0c74b2fea9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that lure users into downloading game-related cheats and "executors" for Roblox. The ML classifier strongly indicates maliciousness, and the presence of external URIs suggests the document is designed to facilitate the download of a second-stage payload. The heuristic for a "Password-protected archive handoff" suggests that the downloaded content may be encrypted to evade initial security checks.

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/431946152/free-executors-for-roblox-game-hack
    • http://berntfoto.dk/images/minecraft-auto-miner-hack_GM479516143.pdf
    • http://berntfoto.dk/images/get-robux-for-free-2021_GM431946152.pdf
    • http://berntfoto.dk/images/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://berntfoto.dk/images/coin-master-apk_GM406889139.pdf
    • http://berntfoto.dk/images/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://berntfoto.dk/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • http://berntfoto.dk/images/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://berntfoto.dk/images/free-game-pack-with-google-play-coin-master_GM406889139.pdf
    • http://berntfoto.dk/images/what-is-wurst_GM479516143.pdf
    • http://berntfoto.dk/images/free-robux-without-verification_GM431946152.pdf
    • http://berntfoto.dk/images/rblx-city-free-robux_GM431946152.pdf
    • http://berntfoto.dk/images/www-rbxhut-com_GM431946152.pdf
    • http://berntfoto.dk/images/cheats-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://berntfoto.dk/images/coin-master-hack-version-ios_GM406889139.pdf
    • http://berntfoto.dk/images/rbx-roblox-robux_GM431946152.pdf
    • http://berntfoto.dk/images/wurst-112_GM479516143.pdf
    • http://berntfoto.dk/images/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • http://berntfoto.dk/images/master-coin-free-spin-daily_GM406889139.pdf
    • http://berntfoto.dk/images/hack-coin-master-without-verification_GM406889139.pdf
    • http://berntfoto.dk/images/how-to-get-free-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000474a.bin
3b68f352323dada9a27231f916265dc76ba3d2dadd1e04336f5657347cc5b793		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x474A 28080 bytes
font_01_sfnt_off000085ad.bin
0010e8e9d3b2fa3a2033abb01eb6105ec98c225a2498b2eb90ac9377a6b08ddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AD 18192 bytes

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