Malicious PDF — malware analysis report

Static analysis result for SHA-256 499cfd192aa87d47…

MALICIOUS

PDF

35.5 KB Created: 2021-07-16 05:53:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: daaf6ef8f1ac2537d38173955626a4ee SHA-1: 4fe012861c374374b2e47acf6bd59af84431b027 SHA-256: 499cfd192aa87d475fa2fd995e234be1f0edad0bd59ce208eb77decc09488e80
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/431946152/free-robux-com-game-hack PDF link annotation
    • http://www.inoxograde.hr/files/roblox-synapse-download-free_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-free-games-without-downloading_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/robux-adder_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-yellow-roblox-girlfriend_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-800-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-free-no-account_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/hack-para-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/ways-to-get-free-robux-2021_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
font_00_sfnt_off00003502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3502 22736 bytes
SHA-256: b1ea26fb853c2b511a6e0716444649b9f02877cfae15953531acf972d4f3d829
font_01_sfnt_off000067e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E7 18460 bytes
SHA-256: cb195acd0f31ed4642a1120884106d6d6ad37130bbbf7ac9bb6f2a8b7761ddd2

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