Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d7b3f87a716344…

MALICIOUS

PDF

35.3 KB Created: 2021-05-23 11:41:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c446c58339c229f6fc5f86fae17491ee SHA-1: e572db53d1df76573e8ce3125b7ccc2606c5c6bd SHA-256: 61d7b3f87a71634405a19c44180d3b7986def7cebfdcbd36a2aab17922012ae5
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 free generators. The primary lure URL is https://netcdn.xyz/app/479516143/free-minecraft-codes-game-hack, which is also present in the document body. The ML classifier strongly flagged this PDF as malicious, supporting the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/free-minecraft-codes-game-hack In PDF document text
    • http://colsaf.co/images/robux-robux_GM431946152.pdfIn PDF document text
    • http://colsaf.co/images/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://colsaf.co/images/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://colsaf.co/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://colsaf.co/images/robux-free-co_GM431946152.pdfIn 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_002_off0000331f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331F 24536 bytes
SHA-256: cce5c323c9bd10fb50c09d477e300ef1646d4b7c292fd5211f0ebce4f8d781e5
font_01_sfnt_off000069e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E4 17884 bytes
SHA-256: ca0982e5699fcbbad1c272e9f6df792bd17b0fef580afa6f1747d77cedc77eee

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