Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7953cdc1eb5d5ac…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 09:10:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c82911f0448f6d9b05f5eacd5f46a35b SHA-1: 48313808cecd770884ba720d05adea557ad24177 SHA-256: c7953cdc1eb5d5ac312ccf69d9b3eee6a1b365deb91a02bfe3d80b1226c5e265
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering a "free Robux generator". This lure is a common tactic for phishing or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/how-to-get-free-robux-in-2021-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/wurst-115_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/pokemon-go-free-zip-code_GM1094591345.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • https://robuxhaxs.comIn 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_off000052af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AF 31228 bytes
SHA-256: df8f40509695d7ec902d1abb1f480b1ce98d27d1794f9d89f8132b5a49c4214d
font_01_sfnt_off00009845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9845 18684 bytes
SHA-256: 824acc3fee39cc83a95b513dc81155ec57b17e0207e8ef2cc186232f9d88d4f0

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