Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd478b2149883191…

MALICIOUS

PDF

42.7 KB Created: 2021-05-15 09:41:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d366a202753814655e529ab2cd9df301 SHA-1: 2643392197be9a9ecd2548c8fc859c1c3c546b3e SHA-256: dd478b2149883191c4603fba391596fce7cec68cc1f8ffab94cb1370fd249012
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed as lures for game hacks and free in-game items, specifically targeting popular games like Coin Master and Roblox. The heuristic firings confirm that the PDF links to a game hack redirector, and the ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains references to these lures and the malicious URLs, suggesting the primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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/coin-master-hack-https-coinms-net-game-hack PDF link annotation
    • http://kontaktadig.se/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A36 25552 bytes
SHA-256: 49ca94ba3e6309296348d50f4798adc16247ffb6076a65d9f82490afc47d80e4
font_01_sfnt_off000084e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E5 18152 bytes
SHA-256: 98ac4e66809d5f1f5b8246c3389f99af71150df64b93ee4f4ebb1a2fd2e53783

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