Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd1a9aeb88aa9f7…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 22:24:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 687ad6cbd2c09393cba170c5cfa2325a SHA-1: 430797790b4d7d150505b5e17717457299ea3998 SHA-256: 2bd1a9aeb88aa9f7c0c02b3bfb975ec394329d5300a3d5b1c7521d4561d0e953
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/coin-master-free-spins-gratis-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/free-membership-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-best-robux-app_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-giveaway-everyone-will-get-robux-proof_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-auto-clicker-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-online-roblox-tornado-games_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-give-free-account_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/10-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-cheat-codes-builders-club_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-online-generator-for-coin-master_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_off00003372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3372 22272 bytes
SHA-256: 11016587fe7edcca5f006e67c5c2f4139eecd540611d5714b646e0eb6f97e788
font_01_sfnt_off000064ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 18176 bytes
SHA-256: 220cc08b156a25e7f0738aa2ffed122a04d3b7eef92f96fc2d602fbd09f3cf7b

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