Malicious PDF — malware analysis report

Static analysis result for SHA-256 921e02b96296eb0c…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 16:19:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2e436f76a6b63a8cdbda1546d772de3d SHA-1: d84c9469486f415b8d7a73c99931eaf1d1f3ee2a SHA-256: 921e02b96296eb0ce8a1fb08d3723f0a9e6a994643132997e70662e969d757c1
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/funbloxxyz-free-robux-game-hack PDF link annotation
    • https://library.univthamrinaka.com/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/rbx-boots-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-xbox-gameachievements-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/pubg-uc-shop-bd_GM1330123889.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/best-free-thumbnail-maker-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-robux-without-human-verification-or-downloading-apps_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-get-free-robux-2021-winwos-n8_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/counter-blox-roblox-offensive-hacks-2021-download_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/hack-roblox-steve-one-piece-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-install-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-tiktok-fans-no-verification_GM835599320.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_off00002f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5A 21812 bytes
SHA-256: 75f0911de4bf1fc5c87ba1e95f938e81af72b85d8d8670d85458e6d054635a9c
font_01_sfnt_off00005f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F91 19052 bytes
SHA-256: b8da4c12b443ea16a452d57305b0b851670a4d0bed79603d1953fd1acd138761

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