Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b7d3876801d4be…

MALICIOUS

PDF

34.8 KB Created: 2021-06-19 02:00:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b8ed557d5c53ec71cd59de33c109512e SHA-1: 22f8cc00f0c63d36b5f42150e0e23044bb3e6074 SHA-256: b5b7d3876801d4beeb267cdc314de74fad3eaac39f868fddb256d5634551f58b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or malware distribution attempt. The document body and extracted URLs explicitly mention 'free Robux', 'Coin Master spins', and 'Minecraft hacks', indicating a lure for users seeking cheats or exploits. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-get-free-robux-august-2021-27th-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/indieun-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-high-school-cheats-horor_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-robux-hack-tool-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/dabi-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-on-ipad_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_off00002e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E15 22860 bytes
SHA-256: f209cb888f6ea7dde2a00c848a2ccfa1d05cf135fb4587cdf16c0e9efe7edd4a
font_01_sfnt_off00006124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6124 19608 bytes
SHA-256: c0f7c579cceeebb65a4a5cd51ad6c2d611f76e0883a13a0356f276e8bbb3577b

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