Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e414cb827c4361…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 20:34:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 599e874821e78c9746cf159f3237e4aa SHA-1: f0588818a399f33f4a6dfc5b8af7ce3f41bebfd1 SHA-256: d4e414cb827c4361a9e56b87e4620d95f715f021c48a6fd4bee4d0b51a13c0a8
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/free-spin-link-in-coin-master-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/code-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-anyones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/buy-delta-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-free-robux-event_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-para-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hack-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cheat-codes-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/rexex-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-superhero-package-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cheat-engine-roblox-games_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-cheat-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-dead-winter-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-robux-2021_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_002_off0000320f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x320F 23324 bytes
SHA-256: eecfb35a54c8ce94556fe663b1ec2340f31fd228c55adda44b5fbb52a4b2661e
font_01_sfnt_off000066c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C9 18344 bytes
SHA-256: d3e962bcabbb5ef935488ecc7aa9e5e3fb65918ede879eb88a760949ba3de850

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