Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ca311fe3176dc9…

MALICIOUS

PDF

44.4 KB Created: 2021-05-17 23:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3fe4355f3b525a63e70c5a88f371539c SHA-1: 5b5737c3e1077d60196e172da90fe31d1eca725c SHA-256: c3ca311fe3176dc997645878d7150c21fe0a7ba91d827b57204ac181a20c67fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The primary lure URL is https://netcdn.xyz/app/431946152/cute-free-hair-on-roblox-game-hack. This indicates a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/cute-free-hair-on-roblox-game-hack In PDF document text
    • http://yochin.org.tw/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://yochin.org.tw/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://yochin.org.tw/images/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://www.semrush.com/prices/In 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_off000048e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E0 28488 bytes
SHA-256: 5e008af5260e65a3113bbaf6377f78475da4e905e8622d7e12dc13fa021910d6
font_01_sfnt_off00008ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB0 18540 bytes
SHA-256: 488c37b81cb6318595a8d643f53454b31d34364b68f61b3c1daecc568804ddf5

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