Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa5e2fa5cd9fdcb…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 06:49:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 203d3d4bc35af64117ba339f32476792 SHA-1: b5d225cd9a23931ba91a487f350558fe5ba4800d SHA-256: 1fa5e2fa5cd9fdcb084768835c7b8071bce72fd56d300b08b52d5a057b7e6f0a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, designed to lure users into downloading potentially unwanted or malicious content. The document body explicitly mentions 'free Robux' and 'game hack', reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful sites.

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-and-tickets-on-roblox-hack-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/inside-the-world-of-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-get-free-robux-online_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-february-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-play-paid-roblox-games-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-shirt-download-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-jump-hack-download_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_off000030ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CE 22000 bytes
SHA-256: 06fad2af09e407a20547dd6fdfeee9e188e95468e2b1688c15818e1a4c2c5cb7
font_01_sfnt_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 19356 bytes
SHA-256: bc57d5aa3736705bbb35821941641103de9850a2860c50106fd9cca80e99f806

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