Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb59500e5160373c…

MALICIOUS

PDF

43.7 KB Created: 2021-05-11 18:18:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cdf8cadb122bdaf2ecfbb78313712b35 SHA-1: 5d30cad14fe2887a11156bdbb6e51ef887b7196d SHA-256: fb59500e5160373c0601f59eaa0116f5c5ce484d479403da08ef5dc46cc0c75b
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary malicious action observed is directing users to potentially harmful websites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/roblox-18-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/best-free-minecraft-hacked-client_GM479516143.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_off00004a12.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A12 27552 bytes
SHA-256: 4bb23deb1b7455dffb1bc023a9fab1ea748388118235848bbed1cd8bc3c01715
font_01_sfnt_off0000892d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892D 18100 bytes
SHA-256: b4983712f09b148f8a8b45296f8ff968c6e941a598ef477ab36d5db1dcb352e3

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