Malicious PDF — malware analysis report

Static analysis result for SHA-256 5526a94282db118b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 11:43:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c7d686a4dd07bf1b91825c0de03e4409 SHA-1: 931b1576e3511eac142feafc8a5cd1b914e985b6 SHA-256: 5526a94282db118bda739d7274caff241333b10eefcc7e72ba251ce67562f74d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary focus on a redirector hosted at http://netcdn.co/app/431946152/box-land-free-robux-game-hack. Heuristics indicate this is a lure for game hacks and a known malicious redirector. The document body, though partially corrupted, also contains references to free Robux and game hacks, reinforcing the lure. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or redirection 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.co/app/431946152/box-land-free-robux-game-hack In PDF document text
    • http://library.patria-artha.ac.id/repository/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-draw-roblox-tips_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/hack-de-roblox-para-conseguir-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-promo-code-generator-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-robux-in-roblox-ios_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/cpat-hacker-in-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-beetle-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/best-forntinte-games-om-roblox-no-robux-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/robux-hack-no-download-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-change-your-name-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-hack-activegamer_GM406889139.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_off00003207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3207 22384 bytes
SHA-256: 3cd821607dba36c5265fdb2be149090a303f8f48839964750555c726b74e8f56
font_01_sfnt_off000063a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 18888 bytes
SHA-256: a59e2e41d5ca66de5fa513a3ea8057a141324f8d9fea4f02994f2926ca7c2495

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