Malicious PDF — malware analysis report

Static analysis result for SHA-256 233850ee3cc443e9…

MALICIOUS

PDF

36.2 KB Created: 2021-07-03 22:03:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 524fe27d906a4ef0bbec747aef8d1839 SHA-1: 9208559350547bdbebada1b7b4c1343e6c4da48a SHA-256: 233850ee3cc443e9660b049f7c4f4cce216248ea50c32f6d428489e93ff1039d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and currency generators. The primary link identified is http://netcdn.tw/app/406889139/coin-master-card-collection-link-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest a phishing or social engineering attempt to lead users to potentially harmful content.

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 http://netcdn.tw/app/406889139/coin-master-card-collection-link-game-hack In PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/roblox-steves-one-piece-hack-tp-chest_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/wwwrobuxhackscom_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/roblox-game-free-download-for-windows-8_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/roblox-2all-site-hack_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/hack-into-anyones-roblox-account-to-steal-their-robux_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-roblox-exploiting_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/click-for-free-robux_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-pe_GM479516143.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000375c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x375C 22980 bytes
SHA-256: fc668a2f83fb0c422cc165bbc6c9e4277c605f6b89548141010252a73038834c
font_01_sfnt_off00006ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE2 18252 bytes
SHA-256: ffcdde65fbc11ac4564943f1b7ab4cc8ae2466c0ddb41cd48a89f042d41a65fb

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