Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f5994c23428197…

MALICIOUS

PDF

34.5 KB Created: 2021-06-30 01:57:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7968aaaf380095b4524006c3da94aa13 SHA-1: c7fe7d47cb4faaf16ccd709eb789360ce60fe7ab SHA-256: 52f5994c23428197debf2f72419387ac2e55668766e870cf2a5593597b548c93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and potentially malicious content, disguised as 'free Robux' or 'game hacks'. The heuristic firings indicate that the PDF links to known malicious infrastructure and employs a lure to trick users. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or malware distribution 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/free-robux-for-kids-no-vertification-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/get-free-robuxg_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-lisa-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-best-hack-for-prison-life-v2-0-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-someones-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-500-000_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-catalog-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-items-that-are-now-expire-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-executor-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-how-to-hack-in-blob-simulator_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-codes-for-roblox-xbox-one-dayz_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-unlimited-robux-ad_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-robux-no-phone-number_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-in-roblox-jailbreak-on-ipad_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/apps-that-actually-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-dayz-cheat-codes_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/furk-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-someones-ip-address-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/wwwbandicamcom-free-roblox_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_off00002f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4B 22492 bytes
SHA-256: 467cc4f971255ec20a4fc20f9d992a4f1f4eebc7743082d6e38613d3518a055b
font_01_sfnt_off0000613d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 19248 bytes
SHA-256: 46fdcb38dd3de5d42f32baf695478089ff2b4e8f731100158a95e08f7d29ebb8

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