Malicious PDF — malware analysis report

Static analysis result for SHA-256 be98919aa23025fe…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 10:26:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cdddc5755e455e5be578eb9af14aae3c SHA-1: a061b696f90c3d53db085ed8b036f9639f37a331 SHA-256: be98919aa23025fed80c74932c57ee85a0a118c60d20eb5afcd80fa1ec334829
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a prominent lure related to 'free Robux' and game hacks. The primary link, https://netcdn.online/app/431946152/give-me-robux-now-game-hack, is flagged as a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to trick users into visiting malicious sites, likely for credential harvesting or malware distribution.

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.online/app/431946152/give-me-robux-now-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/robux-premium_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-minecraft-hacks_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_004_off00005106.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5106 26492 bytes
SHA-256: 2c329ed241974f2f5a642ba27d674de1554f8d72deba8a6bf477a24c1f442003
font_01_sfnt_off00008bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEC 18444 bytes
SHA-256: da387504e4ee90144f6399ec13e2f6eb5be90933d390e8f78ca10c807e4b036a

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