Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb1a42bdc32af114…

MALICIOUS

PDF

44.0 KB Created: 2021-05-11 05:45:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6b833b94c3c849dc90466168cf50090f SHA-1: 0dad57cf3f07c1d8fe4b1e4c66795c1ae8f49196 SHA-256: cb1a42bdc32af114ac8986009a96dad4a6f943d01521e2d525d8bd9199930537
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The ML classifier also flagged this PDF as malicious. The presence of multiple embedded URLs suggests an attempt to drive users to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/479516143/minecraft-pe-free-game-hack In PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-hack-coin-master-game-without-root_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004718.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4718 25760 bytes
SHA-256: 922b47bf82047d1bf02ed6ac431e8bd8b2b2f5b849ca6725dd829499300fb555
font_01_sfnt_off00008191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8191 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00008b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B38 17724 bytes
SHA-256: f623db3d5896acbfca75c1fa71b49e9ae1d6d1c000a87567f3c2fb9ea3a364ca

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