Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a04898bdbba746…

MALICIOUS

PDF

41.7 KB Created: 2021-05-15 00:05:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 060a4740b6f41284b1e0a9aac72488bd SHA-1: 7346f3d98430832c09e0c2b185e12b10ab9d55aa SHA-256: e5a04898bdbba7462b9f3f83dae8f8e5dbdd4c4c1b41e2dfa6116a0f7421ca66
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to external PDF files, suggesting a link farm or content-spinning operation. The primary URL and many others are related to 'Coin Master hack tools', indicating a lure for users seeking game cheats. The presence of a 'download button' heuristic further supports the malicious intent of directing users to download potentially harmful content. No scripts were extracted, but the structure and embedded links strongly suggest a phishing or malware distribution attempt.

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-hack-tool-access-online-generator-game-hack
    • http://linde-erbach.de/images/game-coin-master-hack_GM406889139.pdf
    • http://linde-erbach.de/images/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://linde-erbach.de/images/master-coin-free-link_GM406889139.pdf
    • http://linde-erbach.de/images/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdf
    • http://linde-erbach.de/images/free-chest-coin-master_GM406889139.pdf
    • http://linde-erbach.de/images/how-to-get-free-things-on-roblox_GM431946152.pdf
    • http://linde-erbach.de/images/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • http://linde-erbach.de/images/static-moonactive-net-rewards-2021_GM406889139.pdf
    • http://linde-erbach.de/images/minecraft-svg-images-free_GM479516143.pdf
    • http://linde-erbach.de/images/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://linde-erbach.de/images/coin-master-free-spins-no-generator_GM406889139.pdf
    • http://linde-erbach.de/images/minecraft-bedrock-free_GM479516143.pdf
    • http://linde-erbach.de/images/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://linde-erbach.de/images/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://linde-erbach.de/images/free-spins-from-coin-master_GM406889139.pdf
    • http://linde-erbach.de/images/coin-master-hacks-no-downloading_GM406889139.pdf
    • http://linde-erbach.de/images/free-ways-to-get-robux_GM431946152.pdf
    • http://linde-erbach.de/images/roblox-generator-no-human-verification_GM431946152.pdf
    • http://linde-erbach.de/images/get-me-robux-for-free_GM431946152.pdf
    • http://linde-erbach.de/images/best-free-minecraft-server-hosting_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000493c.bin
d96a0f6b1e123a55b963825f1ddf85f94bb80aa895c85b3b5e0e7d3e3cb66c1f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493C 25140 bytes
font_01_sfnt_off00008225.bin
33ab51800a62a2450932d388ea047aefe8ef17548780c20cda013d20edb28882
pdf-font-stream PDF embedded font (sfnt) at offset 0x8225 17788 bytes