Malicious PDF — malware analysis report

Static analysis result for SHA-256 21183a0870ec34d0…

MALICIOUS

PDF

45.7 KB Created: 2021-05-13 23:10:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 142589936a4b3e6e8415914fec0cc7c9 SHA-1: bdd38a8d6dfbf58c48c795d9cc4519e562bc8f12 SHA-256: 21183a0870ec34d0ee8df7113e3147dcf62157706e5a51efbe8ea2b21f9f0a57
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are related to in-game currency and hacks for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm or scam operation. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/rbxoffers-earn-free-robux-game-hack
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-followers-on-roblox_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-earn_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/free-2021-robux_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-gift-card_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-hack-online-generator_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/get-free-cards-in-coin-master_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/get-free-coins-on-coin-master_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-www-com_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/free-modded-minecraft-server-hosting_GM479516143.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/get-robux-for-free-2021_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-spins-link-download-today_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/free-spin-link-of-coin-master_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/can-you-get-robux-for-free_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-spin-link-free_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000499b.bin
f593eb2d56c9e90f24cc0b7c0f26932c75905f18f985ddf1e0d1081426628bcb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499B 24984 bytes
font_01_sfnt_off00008332.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8332 5696 bytes
font_02_sfnt_off00009043.bin
fa7b58e8bbd6048af1f0a6b5440a1dcdf7c9ae2c9f232fd911927377916bfdb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9043 18244 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.