Malicious PDF — malware analysis report

Static analysis result for SHA-256 11418573a6a604dc…

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 03:28:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5f0a3131c90609b1760e6dca8e130c44 SHA-1: 4008c9e9267901329f9789bda1816e658cd38ac0 SHA-256: 11418573a6a604dc69286b4acd546da02554b9791acdf6d29f80e9811468f870
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 0.9632

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/free-spins-in-coin-master-2021-game-hack PDF link annotation
    • http://unifieo.br/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004950.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4950 24744 bytes
SHA-256: b6286e93d83822c571ccc610009a6cbb77044523bf252f92b79cec71834b0ac0
font_01_sfnt_off0000824e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824E 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00008c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C39 18288 bytes
SHA-256: 875184ae642e109850636143811e44f85c5e94aa46544af5e3834b3aaa47422b

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