Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b73f084b044589…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 22:43:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0cf9ae4e5ab32053f2cf71552f407a52 SHA-1: 58bec450c0ccd94c9aaf79e5d17c2ab7ae9513c9 SHA-256: b8b73f084b0445890373c7bb74bcc5230abd40c56f64e98fdff9eadc314231d4
122 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URIs, many pointing to IP addresses, that are designed to lure users into downloading game hacks. The ML classifier strongly indicates maliciousness, and the heuristic firings confirm the presence of a link farm intended to distribute potentially harmful content. The document body itself contains obfuscated text and URLs related to game exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/431946152/1-hack-roblox-game-hack
    • http://202.56.165.220/digilab/repository/coin-master-hack-without-human-verification_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/a-hack-to-get-the-bage-admin-on-roblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/roblox-free-robuxhack_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/coin-master-free-spins-facebook_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/roblox36com-free-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-get-free-roblox-hacks_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-cheat-in-hole-in-the-wall-roblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/roblox-hack-t0pk3k-40_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/phoenix-hack-roblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/free-games-and-free-roblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/no-human-verification-coin-master-hack_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/2-robux-for-free_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-hack-stats-in-roblox-games_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/roblox-apocalypse-rising-hack_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-hack-people-in-roblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/hack-roblox-espaol-elemental-battleground_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f47.bin
47f46b84adefe45e9b8b9a6ef03db8e98b63f757e8482a1efe640b395cb2f438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F47 22280 bytes
font_01_sfnt_off000060d7.bin
bd9b700479583a97a7757414b27f66975d1d579b8d1d5aed4a229fa3caf56e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D7 18576 bytes

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