Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba675016fbd8e14…

MALICIOUS

PDF

49.6 KB Created: 2021-06-09 03:35:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 90d0356d9f3119da0c8ae73a8af13e4d SHA-1: 6d5a8df912310443b7ad28f97009539179da9319 SHA-256: dba675016fbd8e1447194ecd5974e31239a96275c319f83539c18f1a5f8a4fb3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to files hosted on 'ths-academy.net' and are presented as resources for hacking the game Roblox. The document body and heuristics indicate a deliberate attempt to create a link farm, likely to drive traffic to malicious or unwanted content. While no scripts were directly extracted, the PDF structure and extensive linking suggest a malicious intent to mislead users into downloading potentially harmful files.

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/how-to-hack-on-roblox-with-cheat-engine-game-hack
    • https://ths-academy.net/wp-content/uploads/fsqm-files/robux-matchcomfree-robux_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-theme-park-tycoon-2-cheat-engine_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-hack-roblox-trackid-sp006_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-use-cheat-engine-on-roblox-without-shutdown-2021_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-hack-mod-windows-7_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-free-robux-apps_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-get-free-items-in-roblox-camping-game_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-websites-no-human-verification_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-codes-no-verification_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-no-verification-no-download_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-do-i-get-free-robux-on-iphone_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-hack-tool-robux-and-tickets-download_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-roblox-exploits-website_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/error-connecting-pipe-3-roblox-hacks_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-robux-generators-that-actually-works-2021_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/m-roblox-hack_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-lumber-tycoon-2-how-to-get-free-money_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055e6.bin
9307bec00ca47a708df61234b45ec2eac0c818489d05758d8139783d797aa616		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55E6 25948 bytes
font_01_sfnt_off0000907b.bin
e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907B 3500 bytes
font_02_sfnt_off00009c1d.bin
d2d17700ff9f4bee6bedfc76f9ddd4684f0b55cfe8b32bebcfd11eb81c688415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1D 19224 bytes

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