Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e9d2491ec67e70…

MALICIOUS

PDF

45.1 KB Created: 2021-05-12 01:01:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 194c131016ae8b6ea4f8af90b90d566f SHA-1: 9d53a1801e0b284ecfe5272c3bc0d5f121f18776 SHA-256: 25e9d2491ec67e70dc57a97a9464aff38f02131f6323a01c177616f348cf7af3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a malicious redirector URL. The document body, though partially corrupted, contains text related to 'free coins and spins' and the malicious URL, reinforcing the lure. The presence of embedded URLs and a general ML classifier flagging the PDF as malicious further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.xyz/app/406889139/free-coins-and-spins-coin-master-2021-game-hack In PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-redeem-code-free-2021_GM479516143.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_003_off00004b19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B19 24476 bytes
SHA-256: 4882f0a04758fd8053ca33e59792871fc43e7ae622b9145d4146cf86483856a6
font_01_sfnt_off00008329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8329 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D14 18460 bytes
SHA-256: 871f0cb0a27f8e5dd89901f10b004c29658dd5d4ba968b8e0fec3a5b4bbe6c5a

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