Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb601bb4b58b7d9…

MALICIOUS

PDF

38.2 KB Created: 2021-05-17 03:05:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2ba8409f527f72289a24c8b8bb325a3c SHA-1: 2c4f85155ca5bf9bb4346a6b9e83db925f97b168 SHA-256: 4cb601bb4b58b7d9d0d90a4730fd8157722ab9b900e2befceb3064dacd5bebfa
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'Coin Master Spin Hack'. The document body also contains a prominent call-to-action to download a generator, reinforcing the lure. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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-spin-hack-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000311e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x311E 25592 bytes
SHA-256: 388632112290b8b26cfbf1db038dd61bb0f2f15559c18a9492856d1440f1e858
font_01_sfnt_off00006af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF0 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000074db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74DB 17892 bytes
SHA-256: 7f3ff29013eb9f1a81458cbc85dd3db40ecf793c6bb68bdfdc199744a029032c

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