Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0191819d3a8759…

MALICIOUS

PDF

34.0 KB Created: 2021-06-30 04:18:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fd5e1159c161c8fbd92786c538490134 SHA-1: bada82609c7bebddf3fe5f67a2a0e6a2c947120e SHA-256: ad0191819d3a8759dce3c8a9b9055adc67a67a697241fb48f7d25d171165499b
122 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that explicitly advertises hacks and cheats for games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for such content. The ML classifier also flagged this PDF as malicious with high confidence.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.co/app/431946152/kick-players-roblox-hack-game-hack
    • http://perpus.i2s-learning.com/repository/how-to-sex-hack-on-roblox_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/how-do-you-get-free-roblox-money_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/how-to-hack-coin-master-ios_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-on-iphone_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/free-robux-hacks-no-verification_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/codes-to-get-free-robux_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/minecraft-mods-download-free_GM479516143.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-cheats-2021_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/how-to-hack-into-people-in-roblox_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/free-robux-giveaway-live_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/free-bc-on-roblox-2021_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/free-robux-no-survey_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/www-robux-redeem_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/minecraft-free-download-windows-10_GM479516143.pdf
    • http://perpus.i2s-learning.com//repository/minecraft-hax-download-no-virus_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f94.bin
361398acea7c1af59dc8e07a7b4dcfc9d8335a6c69c82fa2e0f175dc444888d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F94 21944 bytes
font_01_sfnt_off00005fc1.bin
d5b189a79066764aa6400c9018ae795705ea63fd232cd9b3720a843605de0436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 19108 bytes

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