Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc2d2804f1a1c48…

MALICIOUS

PDF

51.0 KB Created: 2021-06-08 23:48:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e60a27981c5ad097745a2f6d4180a3ce SHA-1: 8b461073753fb4c633b9ad4c88ff71c7d65f65d2 SHA-256: 0dc2d2804f1a1c484630b20e81f906ad3cf39ea044ce5de8951238bb927b09f8
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized links for game-related cheats and hacks. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads. The document body, though heavily obfuscated, contains references to "Roblox Free Robux Hack" and URLs related to game exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9861

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 https://netcdn.tw/app/431946152/roblox-free-robux-hack-2021-pc-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/how-ti-get-free-clothes-with-no-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-de-roblox-para-atravesar-cosas-facilmente_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/gun-script-hack-roblox-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coins-coin-master-2021_GM406889139.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
stream_004_off00004ec6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EC6 38800 bytes
SHA-256: 322f5ef97bc9c8d84275fc641150880ca9803e2eb73f91d9a55863fe0d47a335
font_01_sfnt_off0000a33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA33E 19044 bytes
SHA-256: e1a3a8d27fed003c903d6b352ef84a8045779da5e9197622dd4ef5595c9d230c

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