Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24d5a3794514801…

MALICIOUS

PDF

36.4 KB Created: 2021-05-17 07:47:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d6919e221542426cebb09c222ebfe8af SHA-1: 5c4510a171ee60dca212b0383298472973c4da11 SHA-256: c24d5a37945148012af2eb979551b6af52ad16232b5263245008a295efaa2e5d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a "Coin Master Free Chip" generator. The heuristic firings indicate that the PDF is designed as a lure for a game hack, leading to a malicious redirector. While no scripts were directly extracted, the nature of the embedded links and the lure suggest an attempt to drive users to a malicious site, likely for further exploitation or malware delivery.

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/coin-master-free-chip-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000032b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B8 25320 bytes
SHA-256: ff891687c2e07d91b54218e5e7cce2cdea4997719e235faae20ad2534e673a0a
font_01_sfnt_off00006da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA8 18052 bytes
SHA-256: ba3acf3ed697f48690604da7cc833c5df3eb06befc0ffeb0890f4c11738fad23

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