Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a9cb5ece5baa5d…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 23:00:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b4cf520c4c344e015edaed76331d2248 SHA-1: 09909e0de91f6d436a7b9155ff146d2728dfa69e SHA-256: 19a9cb5ece5baa5ddf143728c94b13ffa9cbdb4d1a1b04c19727dd9d9339aaee
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, including a primary URL pointing to a 'free tiktok coins game hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many with long titles, suggesting a link farm designed to attract users with promises of free in-game items. The ML classifier also strongly flagged this PDF as malicious. The document body confirms the lure of free coins and game hacks, indicating a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/835599320/free-tiktok-coins-game-hack
    • https://www.advancedcube.com/uploaded_files/userfiles/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-to-get-free-outrageous-builders-club-on-roblox-2021_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/free-coins-for-coin-master_GM406889139.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/coin-master-free-spins-through-coin-pop_GM406889139.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/play-roblox-free-online_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/roblox-vehicle-simulator-money-cheat_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/is-roblox-free-on-xbox-one_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/coin-master-free-spins--coins-2021_GM406889139.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-to-get-free-clothes-in-roblox-2021_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/coin-master-today_GM406889139.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/minecraft-free-download-2021_GM479516143.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-to-get-800-robux-for-free_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/hang-hack-for-roblox_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/roblox-password-hacker_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/roblox-hack-redboy_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-to-hack-roblox-players-2021_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdf
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-can-you-get-free-robux_GM431946152.pdf
    • http://phenomventures.com/
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003089.bin
d166fb3c85ab5a2e1069fc4c8f58fc021e8c408b23cad00dde7461fef7640810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3089 22588 bytes
font_01_sfnt_off000062bc.bin
fcfbb39a4b44212e2e83dd056e0e3d1a7bdbc0b6b7e3536e733aaa92041c090a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 17972 bytes

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