Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ce23ddd970e7a9…

MALICIOUS

PDF

35.9 KB Created: 2021-05-21 10:41:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 65a9c444695506b43adfaf097ecbe5be SHA-1: 14e95505189f4f7a3b51115a6af3c63bf3adf98d SHA-256: 65ce23ddd970e7a98dc5a4842b0a00c2b5dc076beb611c9732c39bff2c1ea2d6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, specifically advertising 'free generator' or 'game hack' lures. These links, such as 'https://netcdn.xyz/app/406889139/free-spins-coin-master-unlimited-game-hack', are designed to trick users into downloading further malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/free-spins-coin-master-unlimited-game-hack In PDF document text
    • http://rzt.com.ua/images/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://rzt.com.ua/images/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://rzt.com.ua/images/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://rzt.com.ua/images/pokemon-go-free-spoofing-ios_GM1094591345.pdfIn PDF document text
    • http://rzt.com.ua/images/how-to-get-free-premium-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_off000032aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32AA 24316 bytes
SHA-256: 8b8e8d058fd49440f2586876d61749a3da9c5f168bd32464b1a7041d76b7ae1d
font_01_sfnt_off00006a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A19 18580 bytes
SHA-256: 8aad0f2405ec9a3272b05944b48a23572f7af0293916013bea6eee8874d320e7

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