Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ee58b6afad0f8e…

MALICIOUS

PDF

47.3 KB Created: 2021-06-04 02:56:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f3e30b5d1919d7cafe5160da4ddc5714 SHA-1: 710fa12f451b83cee08ca5e139cd4e28d66d1603 SHA-256: 51ee58b6afad0f8e188c0c8357708a7875097d089f7e630902cce5cbb399480b
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 0.9832

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 https://netcdn.online/app/431946152/free-robux-generator-without-human-verification-or-survey-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pubg-uc-price-in-nepal_GM1330123889.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005505.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5505 26408 bytes
SHA-256: 538870609f0bd11ffc7d35b45f66f7951419e1ece823d6a11aa8cfda4b72752c
font_01_sfnt_off000092e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E9 19520 bytes
SHA-256: 8a1ada9ce1afde5346cce04e472b9a05c4abae976985c9fd56cf80b36029c2d4

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