Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84faf2c58ef6d78…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 22:11:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 976d6a096455b3a9a8ffca69c66c0790 SHA-1: 89fe62d02ceb095a7f88af946aed227dfbdc04d3 SHA-256: b84faf2c58ef6d78a5d99c3e8fca1c9cdd85d80969563140156b5466113592c7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-confidence heuristic indicating it links to a game hack lure, specifically targeting Coin Master. The document body and extracted URLs reinforce this, pointing to sites offering free generators, spins, or hacks for popular games. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack vector appears to be social engineering via a deceptive link, likely leading to a malicious website or a download.

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-free-link-game-hack PDF link annotation
    • http://stitqi.ac.id/website/repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-robux-on-roblox-inspect-element_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-coffre-vesteria-free-weekend_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-thumbynail-in-roblox-studio_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-codes-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_off00002ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE8 22324 bytes
SHA-256: a7baa136eb1a9abd8e6ec345d297e44039320e9b5bf2ee2d9126e4a48601cc81
font_01_sfnt_off000060e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E1 18168 bytes
SHA-256: 7e3864b359ae4e20f98f554aea3d5366a72fce57ca0fb6405be6acd76bdcbaac

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