Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6136bb779943b9e…

MALICIOUS

PDF

52.1 KB Created: 2021-06-03 13:28:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8629715f034284f52603cf4fb8fa61c3 SHA-1: f61d4979986c88e99e6ad773e30c3635bb7937dd SHA-256: d6136bb779943b9e8ce16627b14c4eee05deec680a43b1d681c6c77bd17c7c09
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary malicious URL identified is https://netcdn.online/app/431946152/how-to-hack-roblox-accounts-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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.online/app/431946152/how-to-hack-roblox-accounts-2021-game-hack In PDF document text
    • http://perpus.wdh.ac.id//repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/pokemon-go-free-download-for-windows-10_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/pokemon-go-vs-free-fire_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B1 32748 bytes
SHA-256: 13b22ea15563581c8083d5e0a6292ada7f8d61437b35f9d145eb8771828d85a5
font_01_sfnt_off000099c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99C4 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D6 18992 bytes
SHA-256: 91904dcb98687fcf58c7b52e545a9fbf658b3e4d1998331468638ebaf1d03505

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