Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1574b053f43c355…

MALICIOUS

PDF

43.5 KB Created: 2021-04-28 00:54:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 122184f5065ea42716b535b4de2b13e2 SHA-1: 734f432978f32674c9f1d866f73f1b345c00e18d SHA-256: e1574b053f43c3557a15ece82836a3b8607ffaa50da72d0db769e0ca98638474
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a download button, luring users to a "Robux generator" site. The presence of multiple related URLs and the ML classifier's high confidence score indicate a malicious intent to deceive users, likely for credential harvesting or malware distribution. The document body's obfuscated nature and the embedded URLs suggest it's part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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/oprewards-robux-free-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/how-to-hack-roblox-with-command-prompt.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/robux-hack-no-human-verification-android.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-com-toys-free-codes.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/daniel-hack-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-csgo-skins-roblox-id-audio.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-gift-cards-free-codes-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-robux-easy-2021-pc.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-uploader-roblox-exploit.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-free-login-and-password.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-hack-in-to-builder-mans-acount-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004146.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4146 26340 bytes
SHA-256: 8714db17cb87a4c16b40e55f8565025dcdd61aacc0f99bd4f66bad856201e10b
font_01_sfnt_off00007cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD9 2848 bytes
SHA-256: 4737c2778a085e0cb49e73f3b054b1a71e3f40720d213b4bfda97f95a31bfbf1
font_02_sfnt_off0000869b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869B 18756 bytes
SHA-256: cf2792e0dbd1b9dbac6cc5089e6c23eef161ba856fbdeae45faecd98b3883a7b

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