Malicious PDF — malware analysis report

Static analysis result for SHA-256 753c5015d44371d5…

MALICIOUS

PDF

40.9 KB Created: 2021-05-10 18:03:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 43b88cc099f395f7dec751748ed6014d SHA-1: 29dbbbb90881f77f0ddf906c4f536fd0c93e653c SHA-256: 753c5015d44371d5f036b7c9618a429484155fe8f5d5c12b09fa9b4042b960df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The primary URL, https://netcdn.xyz/app/431946152/how-to-win-robux-game-hack, is directly referenced by a critical heuristic. The document body also contains embedded URLs pointing to similar scam-related content, suggesting a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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/how-to-win-robux-game-hack In PDF document text
    • http://butkimloai.com/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://butkimloai.com/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://butkimloai.com/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000040d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40D0 26948 bytes
SHA-256: 066a4eb93295c9bd70f8334ad1a34cf35d97742468b9eea67e266b0206bb9892
font_01_sfnt_off00007d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7B 18332 bytes
SHA-256: fad00ab28ca32ac720175c1db428ad763f82292df9c4789472f562f51e00092f

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