Malicious PDF — malware analysis report

Static analysis result for SHA-256 180555e84a06224f…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 13:12:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6489432f71fb24acf344566653ed194c SHA-1: 268fecc7945797c3918f544307c3da1f6cdd677b SHA-256: 180555e84a06224f834353b6027b8564d2d926e0080ceb39c506062b498252ed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded links and a prominent call-to-action related to game hacks and free currency, a common lure for phishing or malware distribution. The primary link, http://netcdn.tw/app/406889139/get-more-free-spins-on-coin-master-game-hack, strongly suggests a malicious redirector or landing page designed to exploit user interest in free in-game items. While no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to drive users to external, potentially malicious, content.

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/get-more-free-spins-on-coin-master-game-hack PDF link annotation
    • http://lib.uho.ac.id/library//repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/accesories-hacks-royale-high-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/microsoft-free-robux_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
font_00_sfnt_off000032d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D0 23188 bytes
SHA-256: 1c728116f8d75ae3593f486a58ab41da3c36b33989df4051c59836d7ff30ff28
font_01_sfnt_off00006736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6736 18176 bytes
SHA-256: 4fd6d1aceac6cebacd30cf875f8d613d9461a91834818942a997ff440641441e

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