Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9749f2a8ebd997c…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 03:28:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 90c0f1968fc9f665dd0db9434443fb35 SHA-1: ceb2de843c519d66db204bc1f5267da46e163b5d SHA-256: c9749f2a8ebd997cd965a1f4bacd96c8667d0c0b9fdcff16efce83d1f14fc97a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and lures related to obtaining free Robux and other game cheats, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the overall theme indicate a likely attempt to direct users to malicious sites for downloading further payloads or engaging in scams.

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-pastebin-promocode-game-hack In PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-trials-for-explots-of-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-robux-using-inspect-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/game-toolbox_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-make-vip-server-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/ccv3-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_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_off00002f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F53 22460 bytes
SHA-256: 3b201f13c28f749c504992efe871114ffad621f09a6edd3b4624a34a444808a3
font_01_sfnt_off00006172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 19528 bytes
SHA-256: 88ac1e2a977ee1ea72749149dcc54f63e4b54bfe1c842425e9ce2132a5239ea5

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