Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d881bf202e1957…

MALICIOUS

PDF

45.1 KB Created: 2021-06-04 01:24:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4d691b314b02d9365aad4c6b9f94fe64 SHA-1: ad6432472a8bbbaee6e2a41cfe1227ee5af8efb8 SHA-256: 88d881bf202e1957d622f67c9a22939d67eb4e5d35e499a5c3d551e6affa277a
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.online/app/431946152/roblox-jailbreak-hack-download-game-hack PDF link annotation
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/pokemon-go-free-download-hack_GM1094591345.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/get-me-free-robux_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_off00004fd1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD1 28252 bytes
SHA-256: adb82cfe611f5f87aaf025e81dbc438917986fc3aef8d997d1d518602ee00e71
font_01_sfnt_off00008bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAD 18972 bytes
SHA-256: 261da8cecf88d9fe7cdfdd42a26ac06d4c96d8a11aebf729db611f6a559eb8d5

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