Malicious PDF — malware analysis report

Static analysis result for SHA-256 968ba14ae18ffe2a…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 22:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 93538329cbd5fd4c8b30c6bbac8e8222 SHA-1: 704b35012aa4ed5e68dde9c04f64b18b0d3a3e10 SHA-256: 968ba14ae18ffe2a352658b58c1986fdead253c31ab13cda8faa9cb9b488c3d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of a redirector. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or scam attempt designed to lead the user to a compromised or malicious website.

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/coin-master-spin-link-today-free-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-avatar-ideas-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/pokemon-go-free-2021_GM1094591345.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off0000520d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520D 24948 bytes
SHA-256: 56b9cd05f3256554ede1221742954157a04f2c2a5b5ceacc7b411d29611afd60
font_01_sfnt_off00008b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B88 18412 bytes
SHA-256: 86b89ed3101a0e27da5923842e9624157784c801a06cd70b3b60dbae1592697c

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