Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d3ff67086a22914…

MALICIOUS

PDF

46.4 KB Created: 2021-06-04 04:16:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4bfac1a5ab7d522da6e6cd1a94f94ac9 SHA-1: 327fbe78803738aa0d9ccfc1c9b2dfd5187766b8 SHA-256: 8d3ff67086a2291499829bc9f60945efb8d59bbf168ec72ae226976457007e31
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF document contains multiple links to malicious redirectors, masquerading as free game hacks and impersonating Microsoft Office 365 to lure users. The primary link, https://netcdn.online/app/479516143/free-minecraft-windows-10-with-java-game-hack, is associated with known malicious infrastructure. The document's structure and embedded links suggest an attempt to exploit user interest in free game-related content for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/479516143/free-minecraft-windows-10-with-java-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/479516143/free-minecraft-windows-10-with-java-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://youtuIn 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_off00005614.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5614 26244 bytes
SHA-256: 234b8ee522dad6f708281148541f3316f022674493e20020a43b7a060c707a42
font_01_sfnt_off000090ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CA 18972 bytes
SHA-256: f8addffde6ee253966e41eae90cec454d3cd0db0a10e1e45b392757e131b0e3a

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