Malicious PDF — malware analysis report

Static analysis result for SHA-256 1615455e5d5ef015…

MALICIOUS

PDF

34.9 KB Created: 2021-05-13 13:37:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c62a23cac29d805874387822bfced27e SHA-1: 39aa123a8b7507b799bbbea1a4449c180c0f6416 SHA-256: 1615455e5d5ef0154e5a67bfb5465ee5930900afd07fad0d70fcf50588308f39
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a lure for malicious redirectors, specifically promoting a 'free generator' or 'game hack'. The embedded URL leads to known malicious infrastructure, suggesting an attempt to trick the user into downloading a secondary payload. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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-spin-coin-master-2021-link-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_off00003110.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3110 23500 bytes
SHA-256: 8cb0acfb2bb39a7e19bf6740f598825f2cbb1fbd1a75d58a59e53c4b5a0df753
font_01_sfnt_off00006663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6663 18456 bytes
SHA-256: 7500aca679d0fadfbda1e17cf023a195ee80a601fef81e7f7ced8cf50182af56

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