Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86fead2bcf026cb…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 00:02:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fbf73eae6b801f0db91727decdd9d9a1 SHA-1: 63c2c64a2070ccb5129a38467a3b7bbda179b1c6 SHA-256: e86fead2bcf026cba0a1f4679f02507c4ecdaff427672309ab012ac3cfce8416
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'free generator / game hack' lure, which is a common social engineering tactic to trick users into visiting malicious websites. The embedded URL 'http://netcdn.tw/app/431946152/how-to-get-free-robux-on-iphone-game-hack' is identified as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

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/how-to-get-free-robux-on-iphone-game-hack In PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-printables-free_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-pe_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/did-tofuu-het-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-hack-roblox-database_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-boxing-simulator-cheats-xbox-one_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/level-coin_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/dantdm-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/gratis-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-badges-hack_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off000030f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F6 22036 bytes
SHA-256: 64a56c349ce48c51dfb75f95e1c5ac8d6700c721da9bff2595643a226d5df41b
font_01_sfnt_off000061ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AD 19328 bytes
SHA-256: 611facc0ebe53277e6875418a9080e29f4818c8822afe77d04b044b7175153fa

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