Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c3a4757889d552…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 22:09:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d6ba5f017b779eb07a1b73ecd72a917a SHA-1: a8173726c803ca1c9999535dbb89d2ac7e9400f6 SHA-256: 07c3a4757889d552f802695949dec67ab08b3a0057161ae054374bae3219dcd1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary link, http://netcdn.tw/app/431946152/oprewards-free-robux-game-hack, is identified as a known malicious redirector. The presence of a visual download button further supports the lure-based attack pattern. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or scam attempt.

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/oprewards-free-robux-game-hack In PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/protosmasher-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-android-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-free-robux-generator-no-survey-and-humen_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/god-roblox-hack-script-fe_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/fantastic-frontier-hack-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-new-hack-exploit-2021-still-works_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-source_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-roblox-hack-free-robux-generator-uirbx-club_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_off00002e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6B 22168 bytes
SHA-256: fbfdde521b29ff4f80504e3b1f4be2ab1c2559a44068c2e4d9503e826bb5ef62
font_01_sfnt_off00005f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F74 19228 bytes
SHA-256: 28d2551d9716c0c1f642d1de59876c155fe982ad5f1d32fc26186d5dbb125a3e

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