Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcbdd39f5a5cb04…

MALICIOUS

PDF

38.0 KB Created: 2021-05-13 01:04:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d1f496b1028c3a55f8703f6e304c6049 SHA-1: ac87b19ca7ca09787f781577d7ea2aadd1d0d20c SHA-256: 0dcbdd39f5a5cb04004b174b4e6bb83d2471c984c99139d1a30c4af020536bc3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a lure for free game currency. The embedded URL, https://netcdn.xyz/app/406889139/how-to-get-free-spins-and-coins-on-coin-master-game-hack, is identified as malicious infrastructure. The document body also contains similar text and the malicious URL, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/how-to-get-free-spins-and-coins-on-coin-master-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003922.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3922 25200 bytes
SHA-256: ecef275199e601bc5e4ab1fbcb5d25e1eff8482b2df8e7897dd7d87e894109df
font_01_sfnt_off000073af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AF 18224 bytes
SHA-256: c3eeb8e5bbecb0a66d0dccf890560b2772aaf25cfcf2943a976e8e45774626aa