Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08ec3152bd34524…

MALICIOUS

PDF

48.7 KB Created: 2021-06-11 02:10:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1c34089ed0f409377e1320eb7b480e1e SHA-1: fdc4a864e7d4921f4d0cab01fa76403f678cd3aa SHA-256: f08ec3152bd34524ad048a534aea126fff20946640080af4c6251144b35eb986
102 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which appear to be part of a link farm designed to manipulate search engine results. One prominent link points to a URL associated with game hacks, suggesting a lure for potentially malicious downloads or further exploitation. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/431946152/rainbow-wings-roblox-free-game-hack
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-spins--coins-2021_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-minecraft-codes-2021_GM479516143.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/roblox-free-robux-website_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-spins-daily_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-daily-free-link_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-spin-coin-master-iphone_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/daily-coin-master-free-spins_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/make-free-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/minecraft-windows-10-free-trial_GM479516143.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-spin-link-today_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-spins-coin-master_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/minecraft-pe-hacks_GM479516143.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/can-i-get-minecraft-for-free_GM479516143.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-hacks-no-downloading_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/master-coin-free-spin-daily_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005467.bin
cf819e8c7805cfd449a9f2e1bbe2e15d5ac003f56e6f486ee88783c6c08e77d5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5467 25852 bytes
font_01_sfnt_off00008ffc.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFC 2840 bytes
font_02_sfnt_off000099ae.bin
8040f148514625b8c48e5c521fd0541b0522ac3e1e5f7e329caabf865541faf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99AE 18948 bytes

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