Malicious PDF — malware analysis report

Static analysis result for SHA-256 592d57ccddec29f8…

MALICIOUS

PDF

40.3 KB Created: 2021-04-25 08:58:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d686976fef8f31df1c105f7d68e7a53f SHA-1: 77344573981ba4d1e51eca5bc81fb9b5ec90cf2e SHA-256: 592d57ccddec29f880252bdfc7465205a18cf786df46206c03dcb42d87d7c3f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as game hacks and generators. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/431946152/elysian-roblox-hack-free-game-hack In PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/robux-hack-pro-tv.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/hack-para-counter-blox-roblox-offensive-2021.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/armored-patrol-roblox-hacks.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/does-cheat-engine-work-for-roblox-2021.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-promotional-codes-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/robux-pastebin-hack-no-waiting.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/john-doe-hacker-roblox-march-18.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/inspect-hack-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-admin-commands-roblox-download.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-bee-swarm-hack.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_003_off000041d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41D8 25728 bytes
SHA-256: f936b36d3558092e8743766360a8bca8af7236dd89539494896003f1c0b8f66b
font_01_sfnt_off00007a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8B 18644 bytes
SHA-256: eb62d86c0f24f1bfcf308b292e4be7799f288c693df96f021c08c48581aac171

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