Malicious PDF — malware analysis report

Static analysis result for SHA-256 be96bc4129791a59…

MALICIOUS

PDF

46.5 KB Created: 2021-05-17 21:10:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ce895949eebdf3683014c8259fae4a47 SHA-1: bd8ec07ce1c9493990fe987732084244ff4baf6e SHA-256: be96bc4129791a59b2b352b822b8d50137f4fe257553a7a8d6867b5c1d5e2e37
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on siahotel.com and appear to be part of a link farm for game cheats and hacks. The document also requests sensitive information such as recovery secrets or private keys, indicating a phishing or credential harvesting attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/moonactive-coin-master-free-spins-link-game-hack
    • http://www.siahotel.com/userfiles/files/how-to-hack-coin-master-android_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/real-free-robux-codes_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/get-more-free-spins-on-coin-master_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-free-coins-2021_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/guide--coin-master-free-tips_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/how-to-get-free-robux_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/free-robux-gift-card_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/need-free-spins-for-coin-master_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/master-coin-hack-game_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/is-minecraft-earth-free_GM479516143.pdf
    • http://www.siahotel.com/userfiles/files/what-do-roblox-points-do_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-free-spins-link-quora_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/how-to-get-robux-easy_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/free-premium-roblox_GM431946152.pdf
    • http://www.siahotel.com/userfiles/files/coin-master-free-coins-link-facebook_GM406889139.pdf
    • http://www.siahotel.com/userfiles/files/freerobux-hack-us_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049cc.bin
5bfed0942899592c4bf61ada3b09b44387864368635f1c9a1832b313388e03a6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CC 28128 bytes
font_01_sfnt_off00008990.bin
0bb26577d52c8d51e00ad4edc5eaecc41f30204c62dca387b29f5eedfceecc2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8990 2928 bytes
font_02_sfnt_off000093ad.bin
5140a57a6990af64b86c6fc328de463115c3f290c56e1373822c3feaa5dc4a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93AD 18168 bytes

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