Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cfb77f8c0195c8…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 20:07:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a774ee11f1dae8322ceebc16932afa52 SHA-1: 6a15bd02850663d65a9ed0bf82790e259008753e SHA-256: d8cfb77f8c0195c816c329c593a48f70cf4f9279bea6ce3fc34155be1f131a26
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are related to game hacks and free in-game currency, indicating a link farm or scam operation. The ML classifier also flagged this PDF as malicious. The presence of a 'download button' heuristic further suggests a malicious workflow designed to trick users into clicking links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/406889139/100-free-coin-master-spins-game-hack PDF link annotation
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/make-robux_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/simplysarc_GM479516143.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://luckydealuae.com/uploaded_files/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b72.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B72 25572 bytes
SHA-256: 75cd3c53c0c2c2994b14b822cdb812bdf6b857ff586e4a353285263de1d86980
font_01_sfnt_off000083bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BF 18164 bytes
SHA-256: 9d0cd5c2f7e80f3897417466f56f4718a74919a2dd6d9e748d2d2660ff396bc7

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