Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f50c35af9c3b861…

MALICIOUS

PDF

19.2 KB Created: 2021-07-06 01:54:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0aa62c812f271c79f3b9d4269e7f0b63 SHA-1: 99d71ecfce587e9b0b2170f0d1aa80c9025e0550 SHA-256: 8f50c35af9c3b861b29fbbc400050146f7f27f3e882399d8d4f15ab8a426d726
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-35-13-hack-download-game-hack, which is identified as a malicious redirector. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.tw/app/406889139/coin-master-35-13-hack-download-game-hack In PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/como-descargar-roblox-hackeado-para-android-2021_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/roblox-animation-free-download_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/roblox-doom-cheat-codes_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/hack-for-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/free-roblox-card-pins-2021_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31AA 9562 bytes
SHA-256: 9f3dde30f5c813b1324e33b1ddfdddb33f3c4d36d08ca5a1a6658412c6e0b454

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