Malicious PDF — malware analysis report

Static analysis result for SHA-256 452eccba62e41b98…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 10:09:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5d6f7d2f707f89845fbe15f249778d0b SHA-1: 167510e91cd79f0d3b0b7ec63c730af178b3c1cd SHA-256: 452eccba62e41b986e7ddf69d0e9484beaf62239f2e2e349c36c9555b7a9c832
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free items, directing users to external URLs. The ML classifier and specific heuristics indicate malicious intent, likely to redirect users to a malicious site or download further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/479516143/minecraft-server-free-trial-game-hack PDF link annotation
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/mc-hacks_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/simplysarc_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E99 24272 bytes
SHA-256: 6f4655e5ed4b0ff2ef86c1d204d57621e289e7f28d8d007546e737a6b3f46fda
font_01_sfnt_off00008625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8625 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00008fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD8 17756 bytes
SHA-256: ec9c232ae7f2e9c61777f8d0f8676ce95e90a2d5950c4a4b4c910214713d299f

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