Malicious PDF — malware analysis report

Static analysis result for SHA-256 05adf6a2deed7fd3…

MALICIOUS

PDF

41.5 KB Created: 2021-04-29 00:48:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 180987d479d703effcb1fccfc0d3d17a SHA-1: 71fc69b90aa1e0fd555ad1fcb08bbf7964b0401c SHA-256: 05adf6a2deed7fd3a4165e85913b9b140a872f2389157ef82c0f43f46d69668f
82 Risk Score

Malware Insights

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

The PDF document contains a lure impersonating Netflix to trick users into clicking a link that leads to a download. The embedded URL and multiple other URLs point to potentially malicious content related to game exploits and free currency. The ML classifier strongly indicates maliciousness, and the presence of a download button heuristic further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/exploit-roblox-download-free-game-hack.
  • 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/exploit-roblox-download-free-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-unlimited-robux-ad.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-minecraft-game-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-roblox-hair-to-wear.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-no-game-download.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-kindle-fire.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-accounts-roblox-script.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/use-cheat-engine-with-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-fall-damage-reddit.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-roblox-rc7.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-best-hack.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000042c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42C0 25928 bytes
SHA-256: d118a69bf15ac49cd32a1e2d848bf3a13dc4ee101db7617fd3f441c92576b8d6
font_01_sfnt_off00007dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEC 19084 bytes
SHA-256: 6543b45f31fd8116dd0354aeb47165dcb7f53338a524fc970ed690fe79cee97b

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