Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1778bb1707700e…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 10:29:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5cdf9a15ccb871fe7ab03d620ab94a70 SHA-1: 59dd1a71fbacb99e15ffbacfd44fa70cfa240d1d SHA-256: cd1778bb1707700e1c5988ef5966cf16ca01d9031f26cdeba137151611826074
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.co/app/431946152/free-roblox-account-username-and-password-2021-game-hack PDF link annotation
    • http://legs11.co.za/images/free-robux-glitch-2021-september_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://legs11.co.za/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/robux-online_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/free-dress-in-roblox_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/free-roblox-model_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/free-rixty-codes-for-roblox-generator_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_off00002d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D45 22868 bytes
SHA-256: e7b8a6e2878cebcd2a9c26a6e0e273ef5a7aa63d078f8af6ed806b65a3c37406
font_01_sfnt_off00006071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6071 20048 bytes
SHA-256: 8db0aaa745852bfac83f32745bd28d4081495866aec21fe27df35e865a31e7f8

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