Malicious PDF — malware analysis report

Static analysis result for SHA-256 c21f8e5471c7d0b7…

MALICIOUS

PDF

41.3 KB Created: 2021-05-16 14:09:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 029cecdb8494b08054c9158f33ccc93f SHA-1: cea671f0ae797f2ca7571b15d4113415fbd2bd6d SHA-256: c21f8e5471c7d0b72f5ed950b00535d39bc9ea9401a8a5214f4c7cc55ed9f3fb
102 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are related to game cheats and hacks, indicating a link farm or phishing attempt. The presence of a call-to-action phrase further supports this, suggesting the document is designed to trick users into visiting malicious URLs or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-freebies-game-hack PDF link annotation
    • http://agritrade-ukraine.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-coins-and-spins-for-coin-master-game_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_003_off000046dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46DC 25024 bytes
SHA-256: 3a6fd8951d1863ad9df411f10f6f8f0a9d0ad7713dd715ca93b6fb14982d417a
font_01_sfnt_off00008038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8038 17868 bytes
SHA-256: 372242737ab0d4eb2ebe68796557a8f5e24de81c1de3b0fc8c95edc19f938617

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