Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b09aa54086f1c8…

MALICIOUS

PDF

46.5 KB Created: 2021-06-04 01:15:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8d02c7dc2c772074e99eaa6b6eaa1f2e SHA-1: 1aaf6a0e4f389ac3d98e293a91c30cf5a728fa56 SHA-256: a8b09aa54086f1c8a958d387f451fb64b0c3f857689e1a4df1864dfb5f50b47f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URI pointing to a URL that promises free 'Robux', a common lure for malicious downloads. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of external URIs and the nature of the lure suggest an attempt to trick the user into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/431946152/to-get-free-robux-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-for-coin-master-app_GM406889139.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_off0000527f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x527F 28612 bytes
SHA-256: c7beb813cc284c0ad129838bd36a6ad9a4af3929d045f94810878922441ee992
font_01_sfnt_off000093fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FD 18120 bytes
SHA-256: 5233d5aad1bcdd77905869674ceee15891b0fc77671f16174d37808cf9f58ee1

Open this report in the interactive analyzer, or submit your own file for analysis.