Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d2d942749a89e9…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 22:34:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 540d55a5751ad640b45e7624840fc534 SHA-1: 230447f183b7ff3722a201100f09be2067d2f39d SHA-256: b0d2d942749a89e9cea9e1befa6cf3e1d4a8f2b2727533bf275d3154fc018f20
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for linking to a game hack redirector, specifically targeting "Coin Master Free Pet Snacks". The document body also contains the same URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the primary attack pattern involves social engineering via a deceptive link.

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-pet-snacks-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-free-items-instagram_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/regular-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-mobile-hack-android_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-admin-commands-free-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-jailbreak-how-to-get-a-free-bugatti_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-free-camera-not-working_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-daily-spins-link_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
stream_002_off00003034.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3034 22984 bytes
SHA-256: 01fa2884fc7aaaef0ad51ab5a86e625fe53dc110f09a93379fcc32c5cff95650
font_01_sfnt_off000063e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E0 18320 bytes
SHA-256: 70b721ff8e84e5e3b63fc5a4a42e5159d74764d5659d2c470f477e43d1d853e9

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