Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a5b121056ed9bc…

MALICIOUS

PDF

44.7 KB Created: 2021-06-04 01:20:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9a0dc4e8de7c5444e909a6c43c27eedb SHA-1: b2793074b5e611d302028a5766cbaca2e2fe10ee SHA-256: 74a5b121056ed9bc95739b3e208a4c67ffde51e0e0d501ae249e05e8cfd17fc4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded URLs and a document body that promotes game hacks and free spins, suggesting a social engineering lure. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URLs reinforces the likelihood of a malicious download or redirection attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/daily-coin-master-free-spins-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-earn_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_off000051ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AC 25400 bytes
SHA-256: 6429c8c39d67f1d017f29060624e8d7c23f61b4fbc072dea631284bca2de60c3
font_01_sfnt_off00008c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2C 18308 bytes
SHA-256: 2e377c4e9f27697957871a52337602293a8911c67983c74714bc140e9d069187

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