Malicious PDF — malware analysis report

Static analysis result for SHA-256 4641cc16047d03d5…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 06:52:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6c6ea2a697d77efb2a44fd746597f403 SHA-1: 3ffe380f24827c8a3d319aa7c931e6e7eac7b868 SHA-256: 4641cc16047d03d5af776df75014e2bcff353ed72768ef3b618276470121b70b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/479516143/how-to-get-minecraft-bedrock-for-free-with-java-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-come_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.freenom.comHeyIn 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_004_off000055e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55E5 24352 bytes
SHA-256: d821935d9ab5cdd8923cbbae3b5803ff29b679f131d237a12ca3d409b81dc881
font_01_sfnt_off00008ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE1 19080 bytes
SHA-256: 002987b75c35d71c6d5d20848391c929676045185f0534b5c79dddd252281abc

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