Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe948e2623cf5c8f…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 11:55:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9fadd78dc3daf45cc33b30de6cefe1ec SHA-1: f47728a1f46ae8107836bb681eb259c3f5003958 SHA-256: fe948e2623cf5c8fbc2664aa660c4e308858a742f86ba70c05fbf043808910f9
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The primary URL points to a site offering 'Coin Master Heaven Free Spins', a common lure for such attacks. While no scripts were explicitly extracted, the presence of embedded URIs and the ML classifier's high confidence indicate malicious intent, likely leading to a malicious website or further download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/406889139/coin-master-heaven-free-spins-today-game-hack.
  • 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/coin-master-heaven-free-spins-today-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-account-hack-unlimited-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-coins-and-free-spins-coin-master_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_off0000505a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x505A 24572 bytes
SHA-256: e1b58ad3eed16cd74dcac4b181d312e64d2428d8e525204cf1420ebb45d57ad9
font_01_sfnt_off00008862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8862 18356 bytes
SHA-256: 60a5a430713f1161b8494f77535ec8b7c572fc0a829325370a59d32a1885166f

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