Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71ecae6f7031e40…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 07:00:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cc914a33f21b06c88d0fd9db223e4fe1 SHA-1: 6b579b9e649af56968a1c91a2bb9d62b0e51bf04 SHA-256: e71ecae6f7031e402d3fced60e3658b4adebac278e8a9d1cf667b85eafac4335
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure directs users to 'netcdn.tw', identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious content, likely as a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-mod-apk-free-download-for-android-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/free-robux-codes-2021-generator_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-explorer-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-robux-hack-download-ios_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/bc-accounts-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-dominos-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/what-do-points-do-in-roblox_GM431946152.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_002_off00002f4a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F4A 22660 bytes
SHA-256: ea534dc372093c0d6cd3af6e0f0584838d9ea34684e400514c954398ba4a3385
font_01_sfnt_off00006205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6205 18924 bytes
SHA-256: 9c48e35ea9a5dc8e10dc41a2ce9881e75ec73337895d61689671ae319a04d3e6

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