Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cca3b378151b103…

MALICIOUS

PDF

25.7 KB Created: 2021-06-26 05:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c3d3db654523655e19568771d2b081cb SHA-1: 0dd559ac3d84550c499b900dbd18611643219768 SHA-256: 1cca3b378151b103cc923d4af4b0a436ffdcaa94447735129938267778219035
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector hosted on 'netcdn.co', which is flagged as malicious. The document body text and embedded URLs promote 'free generators' and 'hacks' for games like Roblox and Coin Master, indicating a phishing or scam lure. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to potentially harmful content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 3

  • 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.
  • 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/roblox-tix-and-robux-generator-2021-free-download-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-vampire-hunters-2_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-15-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-online-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/cheat-engine-tokyo-ghoul-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-jailbreak-hack-redboy_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/secret-robux-hack-revealed_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-btools-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBA 22208 bytes
SHA-256: eda39040ca909b8cedfa87f257171706d89604083b3834aea6728b473d0da6de