Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d0cfaa6d8044be…

MALICIOUS

PDF

32.6 KB Created: 2021-06-26 20:41:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a14ed51c61d92ef2f5f5ee1d83d7bd5c SHA-1: dea8f18b59e42a3ed87d6f06cc8211a8b2101db2 SHA-256: 03d0cfaa6d8044bef646fbc828bd353788a142777f5b7dd879ba9dc59bcae183
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game cheats and hacks. The document body explicitly mentions 'Hack Para Tener Robux' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', indicating a lure for users seeking unauthorized in-game advantages. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/hack-para-tener-robux-sin-esperar-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/roblox-hack-script-ragdoll_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/booga-booga-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-cheats-dungeon-quest_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/como-hackear-roblox-y-tener-robux-gratis_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-followers-and-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-app-download-pc_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/watch-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-hack_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
font_00_sfnt_off000029b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29B6 21952 bytes
SHA-256: aa486930d0941d493b0dcc9c775e08f179872b6345927a635548189afb628f4d
font_01_sfnt_off00005a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1C 19172 bytes
SHA-256: e7ce30510903f9489bfe479c4861d0994b1588df7ba924796b07f021f82c57fa

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