Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f0a1d0263e55cb…

MALICIOUS

PDF

41.6 KB Created: 2021-05-13 07:05:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: caf7383a78c302620a5486a30df29a79 SHA-1: 4a3abfdd45d5014273e562197b2a2d20fe5d4650 SHA-256: f3f0a1d0263e55cb65c35fd2820275338e2191bfb5ee252b9062754233110995
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9971

Heuristics 4

  • 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.
  • 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/play-games-for-robux-game-hack PDF link annotation
    • http://mbbs.hr/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/robux-in_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/rbx-earn_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/android-coin-master-3433-apk-hack_GM406889139.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_off000046c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46C5 24476 bytes
SHA-256: 791c1e70932eefaebe74a43822122f2bbc1fbb254454f3909452bcfcf8f26dad
font_01_sfnt_off00007e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E46 18912 bytes
SHA-256: 06a2d1523bd9c848a831190500e9901f2d0a20788a0b9c8c3ecae23e11ffa26a

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