Malicious PDF — malware analysis report

Static analysis result for SHA-256 1119193be3e1100c…

MALICIOUS

PDF

42.4 KB Created: 2021-05-11 06:49:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 735ad87eacc580f232f2232ff7e1083f SHA-1: 64f6dd9bd305c8b02d9581983adf5c8f3c54fe73 SHA-256: 1119193be3e1100c1335d8032021b860150a3d01ec850568f30c02f9e2002bef
142 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as legitimate content. The presence of a fake CAPTCHA heuristic indicates a social engineering attempt to trick the user into interacting with these links. The primary URL, https://netcdn.xyz/app/406889139/hacks-and-cheats-for-coin-master-game-hack, is likely the intended destination for the user's interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/hacks-and-cheats-for-coin-master-game-hack
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/how-to-get-free-cards-in-coin-master_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-cards-for-free_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/collect-robux_GM431946152.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/free-robux-by-watching-ads_GM431946152.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/minecraft-pocket-apk_GM479516143.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-apk_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/can-you-play-minecraft-for-free_GM479516143.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-hack-android-root_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/play-games-for-robux_GM431946152.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/how-to-get-more-free-coins-on-coin-master_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/how-to-get-minecraft-realms-for-free_GM479516143.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-hack-spins-android_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/how-many-levels-in-coin-master_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/free-robux-only-username-no-human-verification_GM431946152.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/free-coin-master-cards-link_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/can-i-get-free-robux_GM431946152.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/hack-the-coin-master_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-hack-apk-latest-version-2021_GM406889139.pdf
    • http://bibliotheque-perrigny-les-dijon.fr/images/minecraft-building-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c44.bin
572db6831d6b50a4c50c4d851c2221b9a3b0df98e0f89155a2e6f41c77073ade		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C44 24272 bytes
font_01_sfnt_off000083c9.bin
a46c006b512b84888bc8fbab681985973724221ae7a22be5c9063266660da03e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C9 18220 bytes

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