Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7444c9b64d4905c…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 17:42:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0e844fdf73ee2fd31b27b3cf1a51b270 SHA-1: 680bd4c142184f8669e194086c416b51311f6488 SHA-256: d7444c9b64d4905c26468090f347c316742bf52a81646f60c0ef4f1caf500bb2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as "free generator" or "game hack" lures. The primary malicious URL identified is http://netcdn.tw/app/431946152/robux-free-com-game-hack. The presence of embedded URLs and a visual download button suggests a social engineering tactic to trick users into clicking malicious links, likely leading to further compromise.

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/431946152/robux-free-com-game-hack In PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/wheel-decide-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/ho-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-no-offer-real_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/robux-game-com_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/pokemon-go-free-shiny-celebi_GM1094591345.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/robux-hack-page_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-roblox-accounts-2021-may_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3211 22964 bytes
SHA-256: ef0687adafec83d5aacb41bfe9a54b39b9701b749322fa9952c52ff59e8a33ea
font_01_sfnt_off0000655f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655F 18976 bytes
SHA-256: fb86ad1aad47c5a5c5fa913efd771066ff8edf92cff8bf075126ed023f1935f6

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