Malicious PDF — malware analysis report

Static analysis result for SHA-256 4104ce9e2df1a0a4…

MALICIOUS

PDF

42.9 KB Created: 2021-06-04 01:14:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d5997a9c79adfc5aab940a7a3d82f54e SHA-1: fb869fc37cd1f3ada8e1eb392e11cdfd656ca1c3 SHA-256: 4104ce9e2df1a0a4c8e9640684e3d93e05b4350e159efa9fe283134c460a5c22
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The embedded URL, https://netcdn.online/app/406889139/free-coins-coin-master-hack-game-hack, is presented as a lure for game-related cheats. This pattern is commonly used to deliver malware or phishing content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/free-coins-coin-master-hack-game-hack PDF link annotation
    • http://perpus.wdh.ac.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/near-pokemon-go-free-server_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/i-got-hacked-on-roblox_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_off00004f01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F01 24256 bytes
SHA-256: 193e02d318891e1a27d0d6269d8eb9c9cf040bf0dd674519d43e34beb660f39f
font_01_sfnt_off00008671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8671 17880 bytes
SHA-256: d4b290fbe96f806a63e53895600235ad07ee700a50234ed47d5e5eeda0b1e0de

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