Malicious PDF — malware analysis report

Static analysis result for SHA-256 acfe7ea7c56e8b95…

MALICIOUS

PDF

49.8 KB Created: 2021-06-07 09:19:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7fd98a38a7f0205f992c9dbda55d7732 SHA-1: 8869d96628b523734a6018993470764c6675bd8b SHA-256: acfe7ea7c56e8b95049e06187a356e883b40fe234542535401fe41e65a1a3ef0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a malicious URL. The presence of embedded links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/free-robux-no-human-verification-not-lieing-game-hack PDF link annotation
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pkk.kom.smkn1losarang.sch.id/riped/perpustakaan/repository/free-minecraft-coloring-pages_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_004_off000058e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x58E6 25772 bytes
SHA-256: cbc78c090fdfe479f39daea73d55c69f5ffbdc1f464d08f84b8facb66007355c
font_01_sfnt_off000093cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93CD 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7E 19148 bytes
SHA-256: 5acc44dffd254e75fc46657945354bfef981e83be5ba8452eed43dca9e0613f2

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