Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbf0182eb01ae03…

MALICIOUS

PDF

36.2 KB Created: 2021-05-25 07:35:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ff47fb92840900e3cd1ca617a754d3a1 SHA-1: d25e44dddf2fc8ea5ee0e315ae507174d03792dd SHA-256: 8fbf0182eb01ae03c0828b100f618cc99a54fd82b77a71daabc7e56d9e44a677
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a prominent call-to-action to download a 'Robux Generator'. The ML classifier also flagged this PDF as malicious. The presence of these elements strongly suggests a phishing or malware distribution attempt, likely using a lure related to popular online games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/robux-hacks-2021-game-hack
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/minecraft-free-apk-download-016-0_GM479516143.pdf
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-app_GM406889139.pdf
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/free-spins-october-28-2021-coin-master_GM406889139.pdf
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/coin-master-free-link_GM406889139.pdf
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/minecraft-xray-hack_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032bd.bin
489e0125f2ed211e928166141f5fdb977257ca93aa0e4925d0c8f6238504832c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32BD 24908 bytes
font_01_sfnt_off00006adc.bin
03ab0df94635c5ebeb05191dd2fda9aa410ed650044dc459735f8f7cc99ee4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADC 18648 bytes

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