Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d96ba08ce7aa8d…

MALICIOUS

PDF

33.9 KB Created: 2021-07-20 17:54:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 51fde1bd1d3777422a6ba39ccf2ed210 SHA-1: 8829c05b49ea176a3d082f504c26a94aa2f43472 SHA-256: 08d96ba08ce7aa8deafe54e104a1698e53431ef7c7437583dced6bbdcc40e059
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 0.9946

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/coin-master-free-daily-spins-and-coins-game-hack PDF link annotation
    • https://infocorrosion.com/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://infocorrosion.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://infocorrosion.com/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://infocorrosion.com/images/rbx-free-robux_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_off00002dfa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DFA 23060 bytes
SHA-256: 79f20816f39ac53bc840106011284d1406efe563f41cce7b24f050d73c93153e
font_01_sfnt_off000061e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E1 18480 bytes
SHA-256: 88c5a76ee56cb7e28b06cf9e90949f5a0fd4a72b6dddac6cb3c8c84aebf5620b

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