Malicious PDF — malware analysis report

Static analysis result for SHA-256 619c1adadeb7c3fc…

MALICIOUS

PDF

43.5 KB Created: 2021-05-15 11:34:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b3be663e5d56c39994e82e3f8799bb91 SHA-1: 476ff1ee1fb1d31b192a8e4a824bfd621514240c SHA-256: 619c1adadeb7c3fc459b27ec9245d35ee6fe56f94c726085b81fe28abbff3568
162 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links and a link farm, directing users to external sites that offer game hacks and cheats. The document explicitly requests sensitive information such as recovery secrets or private keys, indicating a phishing or credential harvesting attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/coin-master-hack-pc-cheat-engine-game-hack
    • http://armatrutz.de/images/roblox-skin-free_GM431946152.pdf
    • http://armatrutz.de/images/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • http://armatrutz.de/images/appsmob-info-coin-master-hack_GM406889139.pdf
    • http://armatrutz.de/images/coin-master-hack-apk-download-2021_GM406889139.pdf
    • http://armatrutz.de/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://armatrutz.de/images/rblx-city-free-robux_GM431946152.pdf
    • http://armatrutz.de/images/robux-best_GM431946152.pdf
    • http://armatrutz.de/images/free-robux-no-verification-needed_GM431946152.pdf
    • http://armatrutz.de/images/coin-master-free-daily-spins-link_GM406889139.pdf
    • http://armatrutz.de/images/how-to-hack-coin-master-spin-ios_GM406889139.pdf
    • http://armatrutz.de/images/coin-master-game-download-free_GM406889139.pdf
    • http://armatrutz.de/images/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://armatrutz.de/images/play-roblox-for-free-on-google_GM431946152.pdf
    • http://armatrutz.de/images/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • http://armatrutz.de/images/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://armatrutz.de/images/free-robux-on-phone_GM431946152.pdf
    • http://armatrutz.de/images/master-coin-hack_GM406889139.pdf
    • http://armatrutz.de/images/coin-master-hacks-for-iphone_GM406889139.pdf
    • http://armatrutz.de/images/coin-master-free-spins-hack-ios_GM406889139.pdf
    • http://armatrutz.de/images/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048ae.bin
6601f11caf53d8fc0ddc2d2d18fcd483040275dcc586916711a3aceb1d4e45dc
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AE 27200 bytes
font_01_sfnt_off000087c4.bin
202cff6cc62c8c60a51a1665bd3df642db17a3e84dc9a164b45f2764f23edef7
pdf-font-stream PDF embedded font (sfnt) at offset 0x87C4 18324 bytes