Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabf9e88e82cc9a2…

MALICIOUS

PDF

45.7 KB Created: 2021-05-13 11:36:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1a67cbc3ca179aae4091cf8d58ab52ce SHA-1: da2e70b16582ddf9825d9caf9dbbfc2a05ed81b2 SHA-256: cabf9e88e82cc9a233d29e7b4926b2ae803eaeab485ab1367cae7a82196ba105
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are related to game cheats and free in-game currency. The primary URL points to a page offering 'ways to get free Robux', and numerous other links point to similar content for Coin Master. This suggests a link farm or phishing attempt designed to drive traffic to potentially malicious sites or trick users into downloading further malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/ways-to-get-free-robux-2021-game-hack
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-free-spins-2021-app-download_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/best-way-to-hack-coin-master_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-hack-tool-v1-9_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/mosttechs-coin-master-free-spins_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/daily-spin-and-coin_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-hack-xyz-apk-download_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-card-collection-hack-apk_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/freerobuxhack-us-2021_GM431946152.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/free-cheat-codes-for-coin-master_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/free-robux-com-2021_GM431946152.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/spin-coin-master-hack_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/free-800-robux_GM431946152.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/minecraft-free-download-laptop_GM479516143.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cae.bin
db98743fc9e5265e88c598c1d762f787131c88614d28913cad2739e230e2b23e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CAE 27376 bytes
font_01_sfnt_off00008dc7.bin
23f4c6d0bfdce0b55b29b4c4e1f8fc5f357783b93db13de52c4fadcc57c1eadd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC7 19128 bytes

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