Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9200b939580fbf…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 03:56:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cadca281ba8a0160e748f578450c3e5b SHA-1: 99f316f140c1d4041a02a13241553ac420c27860 SHA-256: 3b9200b939580fbfd0591074e06c5d2952db88bfcc4d9db7c3917ceab2401a67
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to free game hacks and thumbnails, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the presence of multiple links to potentially malicious PDF files further supports this. No scripts were extracted, but the document's structure and embedded links suggest it's designed to lead users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/479516143/free-minecraft-thumbnails-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-often-pubg-uc-appointments_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/wurst-download_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-more-robux-for-free_GM431946152.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_004_off00005317.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5317 25444 bytes
SHA-256: e9ccc87dc420fcecba1a4ab892199d3942f1a56096e9ebe20af39c2249581bb1
font_01_sfnt_off00008d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D51 18368 bytes
SHA-256: 85a02e6fcaecceb391bd1a2e9ef36225352b9e1f533fa420e6bae34b60a7da86

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