Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d74e4b726b56780…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 13:27:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 576d825c878a4a0668ce5f38c4055374 SHA-1: cb4529fe78ff873165df652bb76c9ee35cd96ef9 SHA-256: 4d74e4b726b56780088574a91eba08ba9ac82b6c09ac7b3315bc6ee14f2afb64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and scam-related content, specifically targeting users interested in game hacks and free in-game currency. The heuristic firings indicate the document is designed as a lure for potentially malicious downloads or scams. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest a phishing or social engineering attack vector.

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/406889139/coin-master-hack-apk-2021-download-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-robux-genorater-hack-byhttp-robloxrobuxgamehackco_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/hacks-para-roblox-para-tener-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-client-side-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-account-free-trial_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/cheat-roblox-superpower-training-simulator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/hack-mod-roblox-apk_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/robux-hack-may-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-free-robux-online-no-survey_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/hack-btools-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/2021-roblox-place-free-bricks-image_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/vido-roblox-free-robux-generatorcom_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_002_off0000307e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x307E 22448 bytes
SHA-256: f7683ab5b28c8895f98387f0439f64b11b5daf0beeafeb305943b5827fcf9604
font_01_sfnt_off0000629b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629B 19160 bytes
SHA-256: 08c3d26020315796c296df9400c9a2a920b0dbbe4ac3986bc7fb3bd2c9b27f96

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