Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4eb77002bb41af5…

MALICIOUS

PDF

45.0 KB Created: 2021-05-16 12:01:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 415722ae0c7b3389c26b8676596736b0 SHA-1: c7b838f5b78f1e1298560751c8a292164a8c51cd SHA-256: b4eb77002bb41af5b8c51dbcb56140da5a77f45ddf27ba039afb74e70eaed69d
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 'free generator' and 'game hack' lures. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-pc-hack-download-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/coin-master-pc-hack-download-game-hack In PDF document text
    • http://dieter-sauter.com/images/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-hax_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-site_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a25.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A25 24600 bytes
SHA-256: 9cd5dda0387054858cf943d175fb47cde87455b7c400a6f1e8e642355152f96b
font_01_sfnt_off000082b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B4 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCD 18448 bytes
SHA-256: 8402008f23238815903f7ba327df2f1e722924fad7259551d96baa1836994324

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