Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5731234015dce2d…

MALICIOUS

PDF

44.5 KB Created: 2021-06-09 07:32:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2909bd20dd732393c2a8910bc0dc9fdb SHA-1: 0822737ead15d670e8c28e7d2c898aa7a5cfefa6 SHA-256: b5731234015dce2dc4af8939d13b3caf67fcb6dbd9991894484bada4e30e55e8
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 0.9865

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.tw/app/431946152/roblox-account-hacken-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pokemon-go-free-walk-hack_GM1094591345.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hacks-para-roblox-descargar-jailbreak_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-accessories_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_004_off0000509d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509D 25084 bytes
SHA-256: b8b4f32417aff6e98afb676ed50eb9c54a1d76977faf80cb8301ac58a5016663
font_01_sfnt_off00008ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACE 18428 bytes
SHA-256: 0fa02f7ded548ae08587a918678909efc573bec552f4fa12a34b8ba26b4efe0f

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