Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d86ab0942c7fe5…

MALICIOUS

PDF

35.9 KB Created: 2021-05-12 05:02:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cd62231c47c4a4f7354959a23e2933ec SHA-1: ca4fc918db51f42462dd6672b3c3b151ba7b9e5b SHA-256: 98d86ab0942c7fe58917c8b1e0de9e7562d0fc89c76fc195f6810e06b8cb499c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically disguised as a 'Coin Master Hack Tool'. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-hack-tool-exe-game-hack, is identified as a known malicious redirector. The document body also contains explicit calls to action like 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the lure. While no scripts were directly extracted, the nature of the PDF and the malicious link suggest an attempt to trick the user into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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-hack-tool-exe-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_off00003266.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3266 24832 bytes
SHA-256: 4b7e3103d866066edb6d9923c22f7d72f104fed1a31740e2420749e988bab700
font_01_sfnt_off00006bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBF 18000 bytes
SHA-256: 4986d21a4b5a0dd9c27fb69bc80aac457c531d809421d21d3eeb28a335a679e5

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