Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f263f687a0679fb…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 06:27:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 55c775eeb338aba2295a5ae64a6f8187 SHA-1: a99e6dcdc84d1e8a1c7b468d16ff0cff9a88bc0d SHA-256: 9f263f687a0679fb1b821bbf36332fab24027e5db6c8708e2f633ef8291d39ee
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/406889139/link-for-free-coins-in-coin-master-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pokemon-go-free-android-download_GM1094591345.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-xbox-360-free-download-code_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_off00004e2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E2E 27140 bytes
SHA-256: 1db9ec0216179ab24ff0a4e845a6bd2c761a1b6b2580c8f602a38c6daddc08d2
font_01_sfnt_off00008bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDF 17880 bytes
SHA-256: 2ba4049ee856ee16a7338789b9de70a28ae5aa09727d52a30852826d07af8f7c

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