Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23f627dae47299b…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 21:29:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fdae44365036899380f1d9c0e08fb70e SHA-1: d37181d2234ea8f111399491f69016914f8d9d0b SHA-256: b23f627dae47299b365ffe69d72e97f6339dcbd4b2e4a3cee339d3cc05dddb53
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 0.9980

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 http://netcdn.tw/app/431946152/avatar-roblox-game-game-hack PDF link annotation
    • http://www.gyfunnews.com/ckfinder/userfiles/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/create-free-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/hack-roblox-get-free-tix-robux_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/roblox-toy-codes-for-free_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/subscribe-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/free-robux-generator-that-actually-works-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/roblox-jailbreak-hack-how-to-through-walls-hack-new-2021_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/how-do-you-get-free-stuff-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/how-to-hack-someones-roblox-account_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
font_00_sfnt_off000030ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CA 22584 bytes
SHA-256: 31c8b8587fff6ba61635115ec3d97e29734832d8a24a287d05c741e9f3e6c465
font_01_sfnt_off0000634a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634A 18964 bytes
SHA-256: 1379943476da574a4dab6a8d7032cbe9a71a66405b07e4af99d26083a0ac37fd

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