Malicious PDF — malware analysis report

Static analysis result for SHA-256 533a2df212b693eb…

MALICIOUS

PDF

41.6 KB Created: 2021-05-21 18:33:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 799024c7cb1aa9a2a1f12379a9eac508 SHA-1: 9925d09a864e1201e6050cddfcf9d932f722a4d4 SHA-256: 533a2df212b693ebcfb0bfd94d34146ee9ee612ce49722a980bee5fdde5db94d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent call-to-action to access a 'Roblox Generator'. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a common tactic to bypass security filters by instructing users to open a password-protected archive, which likely contains a malicious payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7466

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-robux-websites-2021-game-hack PDF link annotation
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://elearning.mtsn2kotamobagu.sch.id/__statics/gudangsoal/files/minecraft-hacks-xbox_GM479516143.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_002_off00003344.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3344 26832 bytes
SHA-256: 5e8c27032466e0530a0f76c7f2463dfffecf3c73e95857cfb5b6e5f79b5d8a41
font_01_sfnt_off000072a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4A 18836 bytes
SHA-256: ef44fc6ccc8558fc54da3394cf76e38d99de94399ef86c3bb36f5b939f331685

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