Malicious PDF — malware analysis report

Static analysis result for SHA-256 280cfcc2303732f5…

MALICIOUS

PDF

45.9 KB Created: 2021-05-17 03:29:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 28888a5c1e5fc52ec689cad66e4c7c3f SHA-1: e86f7ec4fb22a152aaa5448b82685c4ee05c48cc SHA-256: 280cfcc2303732f578cb1b05eb72af670a652f9f29ed4401badefd7e7ae77575
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded links, many of which point to pages offering free items for games like Minecraft and Roblox, suggesting a lure for potentially unwanted or malicious downloads. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and 'SE_CLIPBOARD_COMMAND_LURE' suggests an attempt to trick the user into executing commands. While no scripts were directly extracted, the presence of embedded URIs and the ML classification point towards malicious intent, likely involving the exploitation of user interest in free game-related content to drive traffic to malicious sites or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/479516143/how-to-get-minecraft-bedrock-edition-for-free-game-hack
    • http://apostolosandreaslemesou.com/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/free-2021-robux_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/free-coin-spin-daily-link-coin-master_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/freerobuxhack-us-2021_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/roblox-hack-apk_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/free-spins-coin-master-app_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-gold-cards-free_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://apostolosandreaslemesou.com/images/www-roblox-com-free-robux_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/robux-codes-generator-no-human-verification_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/minecraft-hacks-xbox_GM479516143.pdf
    • http://apostolosandreaslemesou.com/images/get-me-robux-for-free_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/win-free-robux_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-daily-1-ga_GM406889139.pdf
    • http://apostolosandreaslemesou.com/images/earn-robux-com_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdf
    • http://apostolosandreaslemesou.com/images/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bfe.bin
522f5ccd4e27fc34bc18a6bbd530b6013b7148dc3474aa2cf22ddb04995d9e15		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFE 25956 bytes
font_01_sfnt_off000086d5.bin
96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D5 2820 bytes
font_02_sfnt_off00009076.bin
3a0999d30397def23c47b5d80e97d9b0f28df4cbffb45a09cf4ec0f6b7597619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9076 18436 bytes

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