Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9272dcdb4f5754…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 12:43:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 580eed4db0ac09c43eaa03d0a4ee02a7 SHA-1: ab4ce1ba8511173158f0b3727a5fcd2abddae5a9 SHA-256: ed9272dcdb4f575414ecbce6232e25c9743a3af7577afc33c03f4cc81b34225c
102 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, forming a link farm, with the primary URL pointing to a "Roblox Hack". The heuristic "PDF_SEO_LINK_FARM" indicates a large number of external links, suggesting a tactic to distribute malicious content or drive traffic. The presence of a "download button" lure further supports the malicious intent of tricking users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/roblox-hack-me-game-hack
    • http://library.acehresearch.org/repository/free-2021-robux_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdf
    • http://library.acehresearch.org/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://library.acehresearch.org/repository/static-moonactive-net-free-spins-coin-master_GM406889139.pdf
    • http://library.acehresearch.org/repository/how-to-get-free-robux-on-pc_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-spins-coin-master-2021_GM406889139.pdf
    • http://library.acehresearch.org/repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://library.acehresearch.org/repository/pubg-uc-hack-2021_GM1330123889.pdf
    • http://library.acehresearch.org/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdf
    • http://library.acehresearch.org/repository/minecraft-marketplace-free_GM479516143.pdf
    • http://library.acehresearch.org/repository/get-free-spins-coin-master-link_GM406889139.pdf
    • http://library.acehresearch.org/repository/coin-master-free-spins-2021_GM406889139.pdf
    • http://library.acehresearch.org/repository/free-robux-no-verification-2021-android_GM431946152.pdf
    • http://library.acehresearch.org/repository/play-coin-master-for-free_GM406889139.pdf
    • http://library.acehresearch.org/repository/google-play-coin-master-free-spins_GM406889139.pdf
    • http://library.acehresearch.org/repository/free-robux-generator-no-survey_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-rewards-free-spins_GM406889139.pdf
    • http://library.acehresearch.org/repository/coin-master-free-spins-link-download-ios_GM406889139.pdf
    • http://library.acehresearch.org/repository/free-robux-promo-codes_GM431946152.pdf
    • http://library.acehresearch.org/repository/spin-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fba.bin
fec9bb12aa7b60557a2f8e3004dac41f7704c9ad45838b7d7199d0ea041f5e61		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FBA 27884 bytes
font_01_sfnt_off00008f7b.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7B 5596 bytes
font_02_sfnt_off00009c23.bin
aef395c884b1121fa113f915db4056a7b0027cd471dc4d96a5cdd03c50f60cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C23 18376 bytes

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