Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73b09edf41c9412…

MALICIOUS

PDF

38.9 KB Created: 2021-05-17 03:32:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3457f0936846bd38ce1d6e947ae3cb70 SHA-1: dc601860f410bcc879bcff801c04b46237e2b0f0 SHA-256: d73b09edf41c94127be08b93abb827c0838bc572af88aadb3a03719723bc49ed
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically a site offering 'free spins' and 'game hacks'. The document body text and heuristic firings confirm this lure. Although no scripts were extracted, the presence of malicious redirector links strongly suggests an attempt to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/free-spins-october-28-2021-coin-master-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_off0000349c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x349C 24016 bytes
SHA-256: 39f58274f343ae665829e64f2df2ef7815c40249d52f2acabbe1642cb02b5dcc
font_01_sfnt_off00006b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B85 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00007528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7528 18656 bytes
SHA-256: ae43edb7d968773fa01f40288fe30e864a12c720900b1687a5763e30cc6382a2

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