Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5a904e19937166…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 15:12:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 58b87810803712457cbacb6eabc5b6ac SHA-1: 6d3f7deb758de0b4be17348015b8db73cdd6f099 SHA-256: 1c5a904e1993716611c4b3d4956b01172e49992680a09e9daf5fac7040ebe073
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary lure URL is http://netcdn.tw/app/431946152/roblox-games-with-free-boombox-game-hack, which likely leads to further malicious content or downloads. The document's structure and embedded URLs suggest it's part of a phishing or malware distribution campaign.

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.tw/app/431946152/roblox-games-with-free-boombox-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-exploit-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-free-robux-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/groups-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-no-steps_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-maps_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-btools-from-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/https-wwwfree-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robux-hack-for-free-easy-no-download_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-and-tickets-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-kid-friendly_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A8 23100 bytes
SHA-256: e28d7602500563ef4d1794e8cb37fdb608d2f80435297203641911a03c302cfc
font_01_sfnt_off000064b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B4 19496 bytes
SHA-256: 1fe97cacaf87faaf7e87019df11dc5da97cf6ecddb8fd4c97aefa44281928813

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