PDF static analysis report

Static analysis result for SHA-256 505b18f108771fdc…

SUSPICIOUS

PDF

45.3 KB Created: 2021-06-10 22:29:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 91cc4c3176294ae070c2b43fe1318648 SHA-1: 486db469dc2c3db8449b385bf81295c6078b5913 SHA-256: 505b18f108771fdcb0bc5c593b0071b6bd9e21d9361239cb3a19ec75d56c07a8
42 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for PDF_URI, indicating an attempt to redirect the user to external content. The document body, though partially corrupted, suggests a lure related to 'free stuff in Roblox', aligning with common phishing or scam tactics. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/free-stuff-in-roblox-2021-game-hack PDF link annotation
    • http://zercalo.org/images/roblox-cheat-engine-fun-commands_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/roblox-how-to-noclip-cheat-engine-feb-2021-mac-apple_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-roblox-cinema-4d-rig_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-roblox-pin-numbers_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/redeem-robux-codes-free_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/100-free-tiktok-followers_GM835599320.pdfIn 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_off0000500f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500F 26092 bytes
SHA-256: 43a778ec8a80b7c62e24179be53e14cccfa0f19ea4dc8ad4f789e0ee93449f4a
font_01_sfnt_off00008d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9B 18596 bytes
SHA-256: dcd32159c76fccff50351ff9feb596a15d05322e4c6090117a3489c614105495

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