Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd742ab31e91ae79…

MALICIOUS

PDF

34.8 KB Created: 2021-07-08 22:35:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 27ebef6f63a14e33be45bd02aa47a920 SHA-1: fbeafa20bdb4a0feb335ce7fb5a2c2662f9b5ed7 SHA-256: cd742ab31e91ae7941d6767e61eb23f8e0e2e90af1b915df2da15a3fa559bd55
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free in-game currency and hacks, directing users to a known malicious redirector. The document body and heuristics indicate a phishing attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/835599320/tiktok-free-liker-apk-download-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-someone-hacked-a-server_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/create-free-account-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-vermillion_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/10-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/what-is-wurst_GM479516143.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_off000032a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A6 22304 bytes
SHA-256: 8c087dae7b18b0fa70b768b06e937cfb34a1eb63e10ffe2db33a1d226423ca1f
font_01_sfnt_off000063e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E3 18728 bytes
SHA-256: 71a391bbec1b8785a1d88c8f12e73e5e513d56b43b6ed27e9771f2fdcdaadc3d

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