Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c18242e6ad1bb84…

MALICIOUS

PDF

36.4 KB Created: 2021-05-19 22:43:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a0da86a56ee2d55e8bad0000610d0cb8 SHA-1: 50e7f38620e236c9fa688134586157c3032de6c6 SHA-256: 5c18242e6ad1bb849e598e6c252600b2aac76e16a3d7314d42c37d1a332570df
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating malicious redirector links, specifically luring users with 'free generator' or 'game hack' content. The embedded URL points to known malicious infrastructure, suggesting an attempt to download a second-stage payload or redirect the user to a phishing site. No scripts were extracted, but the document body and heuristics strongly suggest a social engineering lure for initial access.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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/how-do-you-get-free-coins-in-coin-master-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off000034c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34C2 24424 bytes
SHA-256: b53cd655c591bdb539e07d343088189016f81cd84d42eb9fe108cf5bec531d7b
font_01_sfnt_off00006cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEF 18344 bytes
SHA-256: 266979b75a3224caa69ab43cd24a5c7188e6c45b6e44b7c360b1f701e1d93610

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