Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5afd74c12dc46d1…

MALICIOUS

PDF

36.7 KB Created: 2021-06-28 11:43:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e5816e4f69b0fa3c1856b40e4aa8a1eb SHA-1: d59ac1614951c5e8b2ce5bfd60c5a057905b7eb8 SHA-256: b5afd74c12dc46d12e3850369eee26f03ab80d609012981ec0957bcee81acbce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to a malicious redirector, disguised as a 'game hack' or free generator. The document body and embedded URLs strongly suggest a lure for users seeking in-game advantages, which is a common social engineering tactic. The ML classifier also flagged this PDF as malicious, increasing confidence in the assessment.

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/how-to-change-your-roblox-username-for-free-2021-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-resources_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-a-roblox-account-kazok_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-free-robox-dite_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/gary-s-hod-infinite-life-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/easy-way-to-get-free-robux-works_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-exploi_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/download-hack-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/did-biggy-get-robux-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/black-jeans-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-nike-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-booga-booga-speed-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
font_00_sfnt_off00003436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3436 23400 bytes
SHA-256: f95c9d3fcfea690f9bd9e8cf4549142ba4dbb8312ec7498e4f7f25b5345d9b3d
font_01_sfnt_off000067fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FA 19944 bytes
SHA-256: 58d5e835659902526c12094ddffc5710f83fbe2825a8f92a51b056a6b9134250

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