Malicious PDF — malware analysis report

Static analysis result for SHA-256 d983ad17326da005…

MALICIOUS

PDF

41.3 KB Created: 2021-05-04 07:12:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bfb093dd5613a2b9564458ed14e57f84 SHA-1: a21943b0db82e1229f4f1479080af5d4f2c33972 SHA-256: d983ad17326da005245f5cc077e309e2b742112cfb345095e2aefd2ed8e7c888
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document impersonates Facebook and uses a lure related to Roblox hacks to trick users into clicking a malicious URL. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-group-funds-roblox-game-hack, which likely leads to credential harvesting or malware download. The ML classifier strongly indicated maliciousness, and the presence of multiple related URLs reinforces the phishing and potential payload delivery 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/free-group-funds-roblox-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/free-group-funds-roblox-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-giveaway-every-hour.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/best-all-round-roblox-gui-scrpt-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-hackfree-robux-and-membership-hackaron.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-roblox-robux-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-hack-apk-2401.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-john-in-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/csgo-hack-script-roblox-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/slurp-hack-roblox-jailbreak.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-dinosaur-simulator-how-to-get-megavore-for-free-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-clown-van-hack.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_003_off000041ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41EF 26820 bytes
SHA-256: 56c88a95a62213703f69ea81b36bd9d6c2deb55e05c0d8033c4d859df863bafc
font_01_sfnt_off00007f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F35 18440 bytes
SHA-256: a8ef2ad3914921c79673f863645c4facf3ce415a9d9f182ddd8980c7095eaea9

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