Malicious PDF — malware analysis report

Static analysis result for SHA-256 7414158b98e19d3d…

MALICIOUS

PDF

41.8 KB Created: 2021-05-15 00:43:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9695626c1f7352ed5f88130df75f7bd5 SHA-1: 51d07fa19a24c903a28dab2a5eb29f6bdbbfb15b SHA-256: 7414158b98e19d3d11b2941c08937b693647ab9ecd143cbfbbd011be448f1d22
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that point to websites offering game cheats and virtual currency generators, such as 'Coin Master' and 'Robux'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users through deceptive content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs and the nature of the lures 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-free-link-app-game-hack
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-free-spins-only_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-hack-no-verification_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/300-daily-free-spins-coin-master_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/earn-robux_GM431946152.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-hack-spin-generator_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/free-script-executor-roblox_GM431946152.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/free-coin-master-s_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-card-collection-hack_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-free-spins-hack-ios_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-time-hack-ios_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/free-minecraft-mods-for-ps4_GM479516143.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/free-robux-images_GM431946152.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-free-spins-2021-hack_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/free-robux-thumbnail_GM431946152.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/minecraft-pe-hacks_GM479516143.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/earn-free-spins-coin-master_GM406889139.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdf
    • http://amanaya.in/uploaded_files/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b60.bin
0ffb03d892486e9ce867ff45eef0b7efe0db9a6471f0b051a6f03dc18c09b26c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B60 23820 bytes
font_01_sfnt_off00008196.bin
1a2c2892b32475cb14a35fef15f830f1a64d39087a7078651a892349b640ffcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8196 18056 bytes

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