Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe363f5a6977bd4…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 08:58:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3f253b3d743023de1e21a988f05ff940 SHA-1: bf7480bbeac292d6c3572505e98addf0b8fda8d9 SHA-256: afe363f5a6977bd404883e74c571d8f019f8a7a9a2457081164a34174e942fdb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The primary malicious URL identified is https://netcdn.online/app/406889139/free-coins-coin-master-blog-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at redirecting users to potentially malicious websites, likely for credential harvesting or further malware delivery. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/free-coins-coin-master-blog-game-hack In PDF document text
    • https://library.fdk.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-tiktok-views-trial_GM835599320.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004d99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D99 29764 bytes
SHA-256: 5ef9f569bccc4295dcd62e346ea6a1423172ebb45cd0fda710d71963836f74a2
font_01_sfnt_off00008a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A20 18288 bytes
SHA-256: 525699ae71861fffeab431a07c950b4914d38a871fb98becad0e0bea9ac3f1df

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