Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88550b94af7bf0b…

MALICIOUS

PDF

41.1 KB Created: 2021-05-10 17:11:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6ec8c1fce4688175cca3f8232f0a3e11 SHA-1: 6ae20c9068ffe936fa82c3dc214425fbd765a8ac SHA-256: d88550b94af7bf0be710c75fa37ec0d1a8e9d911167234ccaa1a80f90ac4ac28
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary lure URL is https://netcdn.xyz/app/479516143/minecraft-redeem-code-free-2021-game-hack, which is designed to trick users into downloading a malicious payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8902

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/479516143/minecraft-redeem-code-free-2021-game-hack In PDF document text
    • http://iprep-u.com/images/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://iprep-u.com/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://iprep-u.com/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://iprep-u.com/images/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://iprep-u.com/images/minecraft-xray-hack_GM479516143.pdfIn 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_off00003b2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3B2B 24948 bytes
SHA-256: 8c4ea9eac8c8a6a9909e6c90a4b28725ebb423ee650aea4f8b588469717e1f68
font_01_sfnt_off00007401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7401 3128 bytes
SHA-256: 801f6fa60decd1add2f223f91580103c35e150c924465f86a7a572b3e00674f9
font_02_sfnt_off00007e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E41 18544 bytes
SHA-256: 611277ce03819488b0455d760a99d29b8e1d6f4ae34c09b91ed543aef68bda35

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