Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48504a70ae05148…

MALICIOUS

PDF

46.4 KB Created: 2021-05-13 21:22:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9163ad7d0cad2fbee0a92670c466ea92 SHA-1: 1cbf38aea1c7b73b5cb57b7a6d863e475a47c808 SHA-256: e48504a70ae05148549ac07e035f8a116e542ffda8496da25d5a41bc496f525e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous links to external websites, many of which appear to be part of a link farm designed to attract traffic. The presence of a fake CAPTCHA heuristic indicates the document's intent is to trick users into interacting with it, likely leading them to malicious or scam content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/daily-free-spins-coin-master-game-hack
    • http://halle-wasserball.de/images/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://halle-wasserball.de/images/static-moonactive-net-free-spins_GM406889139.pdf
    • http://halle-wasserball.de/images/free-robux-codes-2021_GM431946152.pdf
    • http://halle-wasserball.de/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://halle-wasserball.de/images/coin-master-hack-app-link_GM406889139.pdf
    • http://halle-wasserball.de/images/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdf
    • http://halle-wasserball.de/images/mcpe-com_GM479516143.pdf
    • http://halle-wasserball.de/images/freerobuxhack-us-2021_GM431946152.pdf
    • http://halle-wasserball.de/images/coin-master-free-spins_GM406889139.pdf
    • http://halle-wasserball.de/images/earn-robux-sites_GM431946152.pdf
    • http://halle-wasserball.de/images/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://halle-wasserball.de/images/coin-master-free-spins-fb-champion_GM406889139.pdf
    • http://halle-wasserball.de/images/master-coin-free-spin-daily_GM406889139.pdf
    • http://halle-wasserball.de/images/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://halle-wasserball.de/images/free-robux-games-that-actually-work_GM431946152.pdf
    • http://halle-wasserball.de/images/free-robux-promo-codes-2021_GM431946152.pdf
    • http://halle-wasserball.de/images/coin-master-free-online-game_GM406889139.pdf
    • http://halle-wasserball.de/images/collect-free-spins-coin-master_GM406889139.pdf
    • http://halle-wasserball.de/images/mc-hacks_GM479516143.pdf
    • http://halle-wasserball.de/images/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004914.bin
f5e29ee1c77f19a973002713d72f9aeb0311cf8cfa2d52bb6b9f95ce5f7af347
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4914 28096 bytes
font_01_sfnt_off0000893d.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
pdf-font-stream PDF embedded font (sfnt) at offset 0x893D 2840 bytes
font_02_sfnt_off000092ee.bin
814bd0a2b88bdef89f3245e401f7fc464bd7314e61fe604409dcfddce4500050
pdf-font-stream PDF embedded font (sfnt) at offset 0x92EE 18308 bytes