Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce6bf50c72d9dff…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 16:00:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c3f645fd3f911e22a90bcd28f9cda880 SHA-1: a60604b9ae4372cf16271dba0ba5abff37576e2b SHA-256: 0ce6bf50c72d9dffac7171742bb142c043d1cb92026a9ef08c2b852fd6d8e85f
102 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to other PDF files, suggesting a link farm or SEO spam campaign. The ML classifier also flagged this PDF as malicious. The presence of a download button lure further supports the malicious intent of directing users to external content.

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/new-free-money-links-coin-master-game-hack
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/games-to-get-free-robux_GM431946152.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-hack-reddit_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/free-spins-coin-master-no-survey_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/do-robux-generators-work_GM431946152.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/free-coins-coin-master-hack_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/free-spins-coin-master-october-17-2021_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/is-minecraft-free-on-xbox_GM479516143.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/facebook-coin-master-hack_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/free-spin-in-coin-master_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/free-robux-com-2021_GM431946152.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-free-spins-that-really_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-twitter-free-spins_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-free-spin-and-trading_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-free-admin-in-roblox_GM431946152.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/free-coin_GM406889139.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/free-minecraft-coloring-pages_GM479516143.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/sites-to-get-free-robux_GM431946152.pdf
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a70.bin
e60c36a73cf11f732e201ad4fae653576627392118f47e06c24865eafe93f5e2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A70 24580 bytes
font_01_sfnt_off0000826e.bin
f61279c4473261222c708140308137155a35f7b52412648030a8269f43a1c894
pdf-font-stream PDF embedded font (sfnt) at offset 0x826E 18224 bytes