Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70cde8409d0c4e3…

MALICIOUS

PDF

48.0 KB Created: 2021-06-10 23:12:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 385a2de7c9fc9f9ac18fe1a66ef11ecc SHA-1: dd7389b32ae15de865b827be35eeb70528491bfe SHA-256: c70cde8409d0c4e3be3abba18fc1f7a2b23cc4548801f46dd7b034eee2ba5241
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 0.9871

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.tw/app/431946152/free-exploit-roblox-mega-download-game-hack PDF link annotation
    • http://educhina.mn/editor/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/hacking-games-on-roblox-with-neopde-engine_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-games-to-download-like-roblox_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/pokemon-go-free-legendary-hack_GM1094591345.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://rblx.landIn 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_004_off0000522d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522D 29372 bytes
SHA-256: 2ada8821cb17c48822ca5da5091e13f9daeb817d49d5caa204a33dd18148e036
font_01_sfnt_off0000958d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x958D 19568 bytes
SHA-256: 9c2645642adfca010aee8f6786f6b98633e61f2390a12edae03202afe2ea0448

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