Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b124f7c27c8fff…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 14:07:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7d13619b28ee49bf3a3440d4d830c7e8 SHA-1: dbd6f9be6da11296535706058471762466d17884 SHA-256: 49b124f7c27c8fffe3e06d72ad5941a7219d759b8121e41a08324a3379a9fa4e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9832

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/431946152/how-to-use-scripts-in-roblox-hack-game-hack PDF link annotation
    • http://lib.vipklh.ru/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-with-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-hack-codes_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_004_off00004ffc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFC 28820 bytes
SHA-256: 7c8c4ef02939c61cc2d806c5fad5fe25e361b678ed829089fc079d7ba0af8bee
font_01_sfnt_off00009472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9472 18932 bytes
SHA-256: fce9e652f89a1af62f774ff2b7937cf54d78de2903c3939778e1916a8682391a

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