Malicious PDF — malware analysis report

Static analysis result for SHA-256 375e1312ee708675…

MALICIOUS

PDF

42.6 KB Created: 2021-05-13 12:00:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 53c4b3ba93a7e7e226acb9e16c2bcf93 SHA-1: 6109d9dc2d3b1794163b41d421ca1b9019b53c62 SHA-256: 375e1312ee708675fa8554604b44c489586f02b6d6b0649e8ec271c2fb11297e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links, including one identified as a malicious redirector, designed to lure users with promises of free game items or currency. The document body and heuristics indicate a scam targeting popular online games. The primary malicious URL is https://netcdn.xyz/app/431946152/claim-free-robux-game-hack, which is likely the entry point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/claim-free-robux-game-hack In PDF document text
    • https://elibrary.sttar.ac.id/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/robux-sites_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/easy-robux-today_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/smart-lodhi-coin-master-hack_GM406889139.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
stream_003_off00004860.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4860 26240 bytes
SHA-256: c22cf57abd0d53fef3f2ec0c545824a3a602008e3518c5af26f943c78bc2313d
font_01_sfnt_off00008319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8319 18696 bytes
SHA-256: 5cf9f9319346d61d0cee7eea738a99b5b91b4687cc89c43f6f5509699f250cff

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