Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb37724f1932fc96…

MALICIOUS

PDF

48.1 KB Created: 2021-06-09 04:51:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c7d5455ec0a195c69564dba5ff017191 SHA-1: 59ff58b698992af71c0b6a4f5b4891c1f0bd6346 SHA-256: cb37724f1932fc968b1c8932ddbeb735962946060ec85cfef035b528028c57c4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirectors and lures users with game hack content. The document body, though heavily obfuscated, contains references to 'Roblox Case Clicker Hack Download' and a URL that aligns with the heuristic findings. The presence of embedded URLs and the ML classifier's high confidence score support the assessment of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-case-clicker-hack-download-game-hack In PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/is-pokemon-free_GM1094591345.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/tiktok-for-free-download_GM835599320.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-rare-cards-for-coin-master-christmas_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_004_off000052f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F6 25172 bytes
SHA-256: 45990e77b2b2f27bb36370b2ad4a9ba78d56d37845678f86f7cb670f5522b030
font_01_sfnt_off00008d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D30 3048 bytes
SHA-256: 7aed23e3b68cab7de2c2aefefb33ea4a9986b96cd09e362fef58ffc656ee58fc
font_02_sfnt_off000097b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B0 18808 bytes
SHA-256: 26e5ce1793c94cf04aa693bfaf4ff9af49a508ae78fade5c10cf10e7511dabae

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