Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cce44b5fcb5999f…

MALICIOUS

PDF

45.6 KB Created: 2021-05-16 06:48:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f5c5c1c2ecdb482f0ffebfbfc09889e8 SHA-1: 11f343d90be737db34e05a9a8e53ad403090d46f SHA-256: 0cce44b5fcb5999ff421fbec268dac002b65f5d875629258013cbd960cc82e5d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that are disguised as game hacks and generators for popular mobile games like Coin Master and Roblox. These links redirect to potentially malicious websites, as indicated by the PDF_GAME_HACK_REDIRECT_LURE heuristic. The ML classifier also flagged the PDF as malicious with high confidence. No scripts were extracted, but the primary attack vector appears to be social engineering through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/406889139/coin-master-free-spins-iphone-game-hack PDF link annotation
    • https://tckontrola.hr/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/robux-cheat_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/add-robux_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAB 26912 bytes
SHA-256: 6009d1353c4c172fe3ac0d219fd76c89ea9f5872f7196c334e2f79b3a67ea807
font_01_sfnt_off00008619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8619 18052 bytes
SHA-256: 7a041e18439e61f25930bd292384183aeabfbba1b3f01f5156e579a6d202eabd
font_02_sfnt_off0000a742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA742 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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