Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a57c9139b18ec7b…

MALICIOUS

PDF

47.5 KB Created: 2021-06-11 01:37:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4ea86df75c2b98a3134a7feb8035f034 SHA-1: f9410033455f238ee9e1e5729aaf290f90941744 SHA-256: 6a57c9139b18ec7b10216af4dc73bbb9d314d405fd6a2066850abd3c4dd4455f
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on `intercraftgallery.com` and appear to be SEO-optimized for terms related to game hacks and free items. The presence of a 'download button' heuristic further suggests a deceptive user interaction is intended. The ML classifier also strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/free-cool-things-in-roblox-that-charecters-played-game-hack
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/roblox-robux-hack-online-no-survey_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/get-free-minecraft-account_GM479516143.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/roblox-free-pets_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/get-free-tiktok-followers-no-verification_GM835599320.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/free-muscle-t-shirt-roblox_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/how-to-hack-on-roblox-btools_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/how-to-stop-animation-hacking-roblox_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/dragon-ball-final-stand-hack-stat-roblox_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/roblox-free-robux-no-download_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/how-to-buy-robux-free_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/roblox-hacks-for-computer_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/coin-master-free-spins-link_GM406889139.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/games-that-give-you-free-robux_GM431946152.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/free-24-7-minecraft-server_GM479516143.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/coin-master-daily-free-spins_GM406889139.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/minecraft-bedrock-edition-free_GM479516143.pdf
    • https://www.intercraftgallery.com/uploaded_files/userfiles/files/free-robux-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000056c6.bin
f93cb156e461bc2adabc04f999823b5f21ba4277ee771ccee3f2533fc4754166		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56C6 25940 bytes
font_01_sfnt_off00009413.bin
ac35433f44b1ee7a44d627cdac5c6ae960c5cc3cc5580d9f92a166e91ffd3e0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9413 19360 bytes

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