Malicious PDF — malware analysis report

Static analysis result for SHA-256 a339b7adb9fd394c…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 02:26:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e428d2a2419baab72bb8a65bff33ea74 SHA-1: adb2467db7ecceae4e2b2256773909dcab40e613 SHA-256: a339b7adb9fd394c7ca608260695d66efd85dad7b934cc00df51df7282784a07
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-spin-facebook-link-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/roblox-santa-hat-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-roblox-free-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/fps-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-advertisment_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hacked-accounts-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-hack-fr_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-hack-exe_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/way-to-get-free-robux_GM431946152.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_002_off000031a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A0 22716 bytes
SHA-256: cea98d76aedf5087d45c087aad6e689c41d2b82938031716bb71334510ca03bc
font_01_sfnt_off0000644e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644E 18504 bytes
SHA-256: 60d2bdc76bcd03856ff56843c76a1045165bedbcd3c7078909a454fabf5c0968

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