Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d1ea86b2607340…

MALICIOUS

PDF

40.2 KB Created: 2021-05-17 02:14:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 14a5855856754f34a7ac511b3d1b9893 SHA-1: abc42299219c22895c2902dbcf60a3f2f1dfe9fe SHA-256: c5d1ea86b2607340939510bbfb365a983aad09c09c2a3179948b7ef5dff29da7
130 Risk Score

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/431946152/free-promo-codes-roblox-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_off000034bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34BB 25480 bytes
SHA-256: 8cb3847090a2688a63f2ea681e1ffd263362863418ef06e0b81402d5ca8057e5
font_01_sfnt_off00006f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6F 3460 bytes
SHA-256: 582708023ba280d4d50e04d3196ed4a98a24323596270ce5a55f31618faa5208
font_02_sfnt_off00007adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADC 18536 bytes
SHA-256: ef80caca2854abdf9bf8720e52e386ee010a7b90d5614c403206ff018aea8f70

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