Malicious PDF — malware analysis report

Static analysis result for SHA-256 42df240e152c5cc0…

MALICIOUS

PDF

45.8 KB Created: 2021-05-15 16:00:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cff7ab776188c58734e8b920775de54b SHA-1: 54a5dacf930b8442fc65e5e6c28708d8eeff196b SHA-256: 42df240e152c5cc06ce1cebf26ec1239b3e441d3a3c4b9d85ae8cbb96f1912e7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed to lure users into clicking on them by promising game hacks or free items. The primary URL, https://netcdn.xyz/app/406889139/free-pet-treats-coin-master-game-hack, is flagged as a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/free-pet-treats-coin-master-game-hack PDF link annotation
    • http://gieldapracy.pl/images/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://gieldapracy.pl/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://gieldapracy.pl/images/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://gieldapracy.pl/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/play-coin-master_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/minecraft-client_GM479516143.pdfIn PDF document text
    • http://gieldapracy.pl/images/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://gieldapracy.pl/images/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/how-to-get-free-robux-on-roblox-2021_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_off00004ab0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB0 32792 bytes
SHA-256: b85715dbeb956d0ca263f2a3185ddc086f11c7c288bde7d4d329e9226ce710cc
font_01_sfnt_off0000927c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x927C 17864 bytes
SHA-256: 276a5511e926ade4da3bb644615f667fa3bbb56bd99d2adc923a65479c9a9e34

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