Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9b973ed26e5b83…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 19:26:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7d79daddf3e6383e6abe61caf7e08c62 SHA-1: ab66949b05470fb2dcdd138d216bd4025c4e39d3 SHA-256: 2f9b973ed26e5b83ce6bc3c75a3bd71d13696251fdeea730680eb0d9a8149552
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 0.9980

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 http://netcdn.tw/app/406889139/public-enemy-sun-prairie-coin-master-free-spins-game-hack PDF link annotation
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/cheat-dbr-roblox-ccv3-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hack-para-obtener-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/pokemon-go-free-trade-evolution_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/pokemon-go-free-coins-ios_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-hacking-kako_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/is-minecraft-free-on-xbox-one_GM479516143.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_002_off0000324f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324F 23476 bytes
SHA-256: 6e49ea9ead7f663bb03933ac795267c7705f899f841e74e0ed5b5c0293aeeefe
font_01_sfnt_off00006788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6788 19140 bytes
SHA-256: f79c1f86898e05eed8f5df8747e436ecde0d43936e78e77bd83e07650a08883f

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