Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff986584844b602f…

MALICIOUS

PDF

35.7 KB Created: 2021-07-01 00:02:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d44ff1e5b2e880dddef749215ef502cc SHA-1: e271d4e6dd38048b0af54e5579510f81f3aa3155 SHA-256: ff986584844b602f2317eb82156b247fdfdbac54f21bc68f38e6e4c2a2233be1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free Robux hack generator' and embeds a link that redirects to malicious infrastructure. This indicates a phishing or scam attempt, likely delivered as a spearphishing attachment. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/free-robux-hack-generator-no-app-download-game-hack In PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/free-robux-by-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/free-robux-right-away_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/free-robux-it_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/roblox-robux-game-hack_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/how-to-hack-any-game-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/roblox-shinobi-life-max-hack_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/fastbucks-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/how-to-get-any-face-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/how-to-get-free-robux-on-xbox-one-2021_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/how-do-you-get-free-outrageous-builders-club-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/admin-codes-that-give-you-free-robux-2021-working_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/roblox-booga-booga-cheat-engine-codes_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/free-roblox-item-code_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/roblox-cheat-enginefor-rodebux_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/roblox-multi-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/como-hackear-a-gente-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/roblox-power-simulator-cheats_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/shirt-roblox-girl-free_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_off000031cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CD 22600 bytes
SHA-256: 239c1e8d5855eeb2290b96ca93815e20e43319df64b48c32e447638250fafbf0
font_01_sfnt_off00006460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6460 19744 bytes
SHA-256: c2045968bfc7bfdb8ede2ded0eb6ec8b8beb9d1812b9f8b29a8c40486dd99e27

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