Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0430439f6c47192…

MALICIOUS

PDF

45.4 KB Created: 2021-05-17 20:32:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c2e331b7bc53e0dc0008c8921371dcd6 SHA-1: 0172637b2062faf3d87a25267ca445f4d642cb1c SHA-256: c0430439f6c4719218f107083ae391dee1478a56a8a0b5504c51c3dbf5eb704f
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 0.9507

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/431946152/free-robux-working-game-hack PDF link annotation
    • http://bc97.de/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://bc97.de/images/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/static-moonactive_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bc97.de/images/best-free-spins-link-coin-master_GM406889139.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_off00004836.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4836 24620 bytes
SHA-256: 8c5378f0a9c1acf96ab1d3995221beb15cee2ba27b9409c6bd17ac16861e0987
font_01_sfnt_off00008090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8090 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D38 18788 bytes
SHA-256: 146362cb081aa7c6718ebc51132ca2538876dc1922f8d33668898621d3d02efe

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