Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7b43c316847e01…

MALICIOUS

PDF

48.6 KB Created: 2021-05-16 15:17:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3f31c97dedb6aa51b9b5f27f4efcbf66 SHA-1: c798eb59525d955f1b7500a3a419991c9613f481 SHA-256: 1f7b43c316847e0177b4da011e11580b0df6cfda2b4ad727bcf2c5bc65f2de38
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/roblox-images-game-hack PDF link annotation
    • http://www.drent.se/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/robux-free-2021_GM431946152.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_off0000496b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496B 37844 bytes
SHA-256: 8cfc5f222f5ec1cecce2cd11b8abbd477783aeef12e0525f582923cdf2f9d7a3
font_01_sfnt_off00009b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B05 18560 bytes
SHA-256: 60fc3caab79bd3686efc44dc5524dac0a031abeba3a924753552739ae08f0db7

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