Malicious PDF — malware analysis report

Static analysis result for SHA-256 cffaf1a999e093a5…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 12:06:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d6ec315fefff568b600dc8a9cb1abd36 SHA-1: 96bc9b962da57322c50a73d7646ca88688c750f1 SHA-256: cffaf1a999e093a592d6664d7e2c7a2bd6ddc2a728aedf24c5b2d1d56df77e7f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" downloads. The embedded URLs, such as https://netcdn.online/app/431946152/hack-download-game-hack, are designed to lure users into clicking them. The document's structure and content strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/hack-download-game-hack In PDF document text
    • http://abdinusababellibrary.ac.id//repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-link-spin_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
font_00_sfnt_off000050ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50AD 25808 bytes
SHA-256: 373a366d08deb7778cce9a7d589df53fb91c30b51a365a996a932c85aaac9f98
font_01_sfnt_off00008b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B74 3992 bytes
SHA-256: ca9cd4f0345d8483bda3e807ea4e40142b8bf70d3672af2d6a5dd7953d1a2391
font_02_sfnt_off0000989b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x989B 18320 bytes
SHA-256: d1c8e8c65baa96442d6d687c0ecc4ed575715aad60d34b47b8ab6e4b5accbb3c

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