Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea348e8a034ad383…

MALICIOUS

PDF

44.6 KB Created: 2021-05-11 21:06:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dab50784b22cd17db62c96d177ca5892 SHA-1: 6b5c76c0cf6a9756b1093aa5f337d8c48a7456ff SHA-256: ea348e8a034ad383a405ee719827a7f5a562e717ccb534f3c51e956b53e7af7b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free generator / game hack' to trick users into clicking malicious links. The embedded links, such as 'https://netcdn.xyz/app/406889139/pig-master-coin-master-free-spin-game-hack', are identified as malicious redirectors. The document's structure and content strongly suggest it is designed to lead users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/pig-master-coin-master-free-spin-game-hack In PDF document text
    • http://www.nfca.org.tw/upload/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/robux-link_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/rbx-earn_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/hack-coin-master-spin_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_003_off00004bf6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF6 28000 bytes
SHA-256: 619a733eb5afcb461c9bb370ad08e83cecacc9810293fb854a20269b2c6f6e36
font_01_sfnt_off00008c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C02 18328 bytes
SHA-256: c0a64c35313388beafce2145b76a0bf40d6659a82da461cbcb21248082e95923

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