Malicious PDF — malware analysis report

Static analysis result for SHA-256 685d271d9abfb385…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 04:30:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aae84190c4bdc3f5b81fa5d286db5a2a SHA-1: 10e62cf0fedea3ef4970aba8aa5b658603748219 SHA-256: 685d271d9abfb3852d161da2fe53b29efcff20854109bd5219ca386562a971dc
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 0.9980

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-hack-https-coinms-net-game-hack PDF link annotation
    • https://www.e-starmagazine.com/uploads/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/tiktok-free-to-watch-online_GM835599320.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-hack-trolling-download_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-homepage_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/freepsy-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-spins-coin-master-2021-glitch_GM406889139.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
font_00_sfnt_off00003238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3238 23088 bytes
SHA-256: 0e9f0cbd48cb979621da45a264788803bbd799b022ca44bcfd1a6a1aa185e8c3
font_01_sfnt_off0000661c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661C 18440 bytes
SHA-256: d4a0ce670d7ff27a0341fb2a5bc1c8134718dc63ae2ec70999bf7230e535e219

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