Malicious PDF — malware analysis report

Static analysis result for SHA-256 3340af89e0ee2fab…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 10:11:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 551c6e705e4a5b3c81cc5d76b2103ef3 SHA-1: c835bc9c0b97d16355446e93541ba5aed6efccb9 SHA-256: 3340af89e0ee2fab4fa959d0d9a0cd75ffbbeb605b435478b19add468da4d239
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/406889139/free-spin-coin-master-today-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/roblox-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-robux-free-legal_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/plutonium-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/does-roblox-track-the-ip-of-the-hacker_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-upgrade-to-roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-things-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/best-hacks-for-frappe-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pubg-uc-official-price_GM1330123889.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-uk_GM406889139.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_off00003240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3240 22940 bytes
SHA-256: a0e1619a4d8670d08f9ab49cd6caaed8a265dcf59d80f0f0c5c398502ad671ea
font_01_sfnt_off000065ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EF 18528 bytes
SHA-256: 8559a42025878442b636b23f976b7f436f27459db74de5b3dc9e3bb62ad5c1a0

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