Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa66d1d482b6b806…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 11:07:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 03211956c5abbf674979656ab42b8ad7 SHA-1: ab8bda676916a93201050e472d27006ee0d1cdd1 SHA-256: aa66d1d482b6b80687ed5c3af4236709eb3106dd694cb1b962087557844fa1fe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, specifically mentioning 'Coin Master', and includes a high-confidence heuristic firing for a game hack redirector. The embedded URL, http://netcdn.tw/app/406889139/hack-version-of-coin-master-game-hack, likely leads to a malicious site designed to exploit user interest in free game resources. No scripts were extracted, but the document's structure and content strongly suggest a phishing or social engineering attack.

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/hack-version-of-coin-master-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/i-want-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/equixel-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pokemon-go-free-things_GM1094591345.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-2021-on-phone_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-fast-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/unlimited-robux-level-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pubg-74-uc_GM1330123889.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.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
font_00_sfnt_off00002f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F76 23036 bytes
SHA-256: e22fb77c08c46a1ca14949ab5582be4d7eadb0eb86052af89655837e007c0735
font_01_sfnt_off00006331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6331 18140 bytes
SHA-256: 1a5bb5b68a1609c77e65a57ece2ff9a2d15fca7c4daa681adc792855e60eabcf

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