Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c225c40d24e5437…

MALICIOUS

PDF

38.0 KB Created: 2021-05-11 19:47:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 94e2fb7affa36b7742f2ee2013465e01 SHA-1: b939fe8638aacfdad34b53aa1c5616dfee40d820 SHA-256: 4c225c40d24e543779a7e69eb17c7fac0920914be8758ba5dda4d3d8b721daf6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Hack'. The heuristic firings indicate the document is designed as a lure to trick users into clicking these links, likely to download further malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0126

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-https-coinms-net-game-hack In 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_off000032e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E0 24084 bytes
SHA-256: 8c0a80fa96d59874affd77d2ccea364b13c91bb18e02fa61772f4847074536b3
font_01_sfnt_off00006969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6969 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 18152 bytes
SHA-256: 98ac4e66809d5f1f5b8246c3389f99af71150df64b93ee4f4ebb1a2fd2e53783

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