Malicious PDF — malware analysis report

Static analysis result for SHA-256 518f0cc534711e1e…

MALICIOUS

PDF

31.7 KB Created: 2021-07-06 12:11:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9061eb2684cf0b199aa3f0c86846535c SHA-1: 50264e84cb6ec34ebed9aadcbb3e1bf09c8e63d2 SHA-256: 518f0cc534711e1e62482a27f0b1519be9335e077317f3b91f614e3ff13ca471
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that lure users with promises of free Robux and game hacks. The primary malicious URL identified is http://netcdn.tw/app/431946152/what-games-on-roblox-give-you-free-robux-game-hack, which likely hosts a secondary payload or phishing content. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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/what-games-on-roblox-give-you-free-robux-game-hack In PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-best-games-free_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-roblox-promo-codes-2021-may_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/climrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-hacks-for-imac_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-hack-with-winrar_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/your-cheating-on-your-roblox-girlfriend-meme_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/pokemon-go-free-kr-hack_GM1094591345.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/hack-prison-life-roblox-2021-pc_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/hacking-into-roblox-in-roblox-jailbreak-story_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-on-roblox-pc_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-hack-minecraft-pe_GM479516143.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A7 22996 bytes
SHA-256: acb61a451625df48b91c1e4d32bce547a177e8339f74c3e7042c56f6fc316445

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