Malicious PDF — malware analysis report

Static analysis result for SHA-256 138739a48f617da7…

MALICIOUS

PDF

42.3 KB Created: 2021-05-19 02:12:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4a42d8c7a04ccae2f4f15330354a9dc8 SHA-1: a9db4b2faffd5877694aef4963ee09841834a4f8 SHA-256: 138739a48f617da75a6258382669d6baac1a0f99a5edddf51d95ef77ad179ebc
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to a known malicious URL. This suggests an attempt to trick the user into visiting a site that likely hosts further malware or phishing content. The embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/como-hackear-coin-master-2021-espaol-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_off00003640.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3640 31708 bytes
SHA-256: 824b7a1d99f09fe22ce332186293666a948ca85b14c99fd7f5d61b560781364a
font_01_sfnt_off00007945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7945 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off000082e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E8 18628 bytes
SHA-256: 51d0c26a7700976d4b9729d2086435caf3cf2216ab56e6e35ff28649202ea5db

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