Malicious PDF — malware analysis report

Static analysis result for SHA-256 938604062069a5bd…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 09:29:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f05b35014ddd6e7bbfec38a4775d30a8 SHA-1: 67a8dcf3a838cf5a3045ebccc463ece568ee9e52 SHA-256: 938604062069a5bd5f265343f1509bb40625ec523e1575de193ee687e080ee14
122 Risk Score

Malware Insights

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

This PDF document is designed as a credential phishing lure, impersonating Facebook and directing users to a fake 'game hack' generator. The embedded link, https://netcdn.online/app/406889139/gaming-dunia-coin-master-free-spins-game-hack, is the primary indicator of this malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it leverages embedded links to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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/gaming-dunia-coin-master-free-spins-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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/gaming-dunia-coin-master-free-spins-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/apps-for-free-robux_GM431946152.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_off00005115.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5115 24912 bytes
SHA-256: d35780e464cc9a4a6918107f90e9a45f0b0e8a682f2d1206a4a5350ec89268b1
font_01_sfnt_off00008a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7C 18740 bytes
SHA-256: 7b05614de858a73441bc17da98c7faeabf1858f8a73247351f9fe6dc17e7eefa

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