Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ce99bc098c96d1…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 03:06:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e1933dcd0e3495db70d60e9d770ae69f SHA-1: 576b576dab5e4b3665db9d0988563083c7c80273 SHA-256: 65ce99bc098c96d1e4bdb1fbe3b20be1999226ca7041e35d7c8b9471db8c3eb7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary link identified is https://netcdn.online/app/406889139/how-to-get-free-spins-on-coin-master-ios-game-hack, which is part of a larger pattern of redirecting users to potentially harmful sites. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/how-to-get-free-spins-on-coin-master-ios-game-hack In PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/cone-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/robux-giver_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-and-builders-club-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005053.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5053 25760 bytes
SHA-256: cbfbd32289872948b67a7ea04ab51b3202936255a3774d627e05b19ba29edb23
font_01_sfnt_off00008a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A89 18052 bytes
SHA-256: 751b5bf5e2baa224d49100cdcfdcfacb8a421785831d1efd4091db32238aca98