Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca00ef9a9e07f123…

MALICIOUS

PDF

33.8 KB Created: 2021-06-30 04:41:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fee4cbc4060dbc1aae38283ec801489e SHA-1: 52a50db95253d38209d8e7d83e94ab5e96f538a0 SHA-256: ca00ef9a9e07f1231278961f4153c06d46e36802b68f3b36bbdfb3c25f2ff210
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, http://netcdn.co/app/431946152/app-robux-free-game-hack, which is presented as a lure for free game hacks and currency. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful content.

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/app-robux-free-game-hack In PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/apps-for-friends-2021-free-robux-site-playgooglecom_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/how-to-get-free-robux-online-no-survey_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/roblox-download-free-games_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/how-to-hack-gamemodes-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://www.luangtai-ngao.go.th/UserFiles/File/roblox-follow-anyone-hack_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_off00002d69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D69 22340 bytes
SHA-256: fae4c01d976fceb09978ca0476f9093b5c00ca89830e4963d64537bf3378b55d
font_01_sfnt_off00005f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F47 18892 bytes
SHA-256: d5b2acdc49b321ccabf14b559f33a5b4d924d994a48c3f3e197d0bfcdee7b395

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