PDF static analysis report

Static analysis result for SHA-256 c187dcf4f88c1a24…

SUSPICIOUS

PDF

44.6 KB Created: 2021-06-09 00:45:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 612085d985e8f0575c0cf398cbdd0452 SHA-1: 41bbba6ac3b778a58dfec2484fe4771c7d959579 SHA-256: c187dcf4f88c1a24477d784bb91f762b98814088e28c9d8244f9430a380226a0
42 Risk Score

Malware Insights

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

The PDF document contains an embedded URL and a visual call-to-action button, both disguised as a 'game hack' lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The presence of multiple suspicious URLs suggests a download or redirection attempt, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 3

  • 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/hack-game-roblox-game-hack PDF link annotation
    • http://zercalo.org/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/100-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://zercalo.org/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/easy-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-sign_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://krnl.rocksIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50AF 25064 bytes
SHA-256: 9de36e38e8700d369612d4ed2853bff6a3017a27aa6afd9ae2bf8a9c455d8bc3
font_01_sfnt_off00008afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFB 18440 bytes
SHA-256: 62dc39ba1142e74fbcda5e8560913c95cafeb24d2dd98e469c7ccabd6f7a61bb

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