Malicious PDF — malware analysis report

Static analysis result for SHA-256 921a5f59628bc17f…

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 06:19:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d362d32c2821869f41daa5ddf12a438c SHA-1: f4b9683757672e49fc0876cebebc5dbbbbf3deda SHA-256: 921a5f59628bc17f812b6c94a6b87c4bbbee2d268c844c0cdcf20698c618b12f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.co/app/406889139/coin-master-34-4-hack-game-hack. The document body and embedded links suggest a lure for game-related hacks or currency, which is a common tactic for phishing and malware distribution. The presence of a malicious redirector indicates an intent to lead the user to a harmful destination, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/coin-master-34-4-hack-game-hack In PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/buy-tiktok-likes-free_GM835599320.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/tiktok-free-skin-ml_GM835599320.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-easy_GM431946152.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_002_off000031b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B8 23308 bytes
SHA-256: 8d3b474e46b59c54b810417ece2b979adfb0e79b8fa35ec65b47b893827c8277
font_01_sfnt_off00006695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6695 18240 bytes
SHA-256: c6a603a236db465a7556ab6a5027bd55d5ce2b4fe35e46119782d363115cdd6f

Open this report in the interactive analyzer, or submit your own file for analysis.