Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6dc3ecb31b9e36c…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 09:25:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e0ad2d7b836962a80613e6f49ef66ade SHA-1: 69e66a60d6a8d56cda4eaa855a11ff95386c1560 SHA-256: f6dc3ecb31b9e36c00558278d2967b885ad6889d3e2eb67df867032a3efd5158
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/hacking-peoples-account-on-roblox-game-hack. The document body and embedded URLs suggest a lure for game hacks or generators, which is a common social engineering tactic. No scripts were extracted from this sample, but the presence of malicious links and the lure indicate a phishing attempt.

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 http://netcdn.co/app/431946152/hacking-peoples-account-on-roblox-game-hack In PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-cheats-deutsch_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-escape-game-cheat_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/pokemon-go-free-zekrom_GM1094591345.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/robux-gainer_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-website_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-khaos_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/easiest-money-hack-february-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-free-stuff-on-the-catalog-roblox-2021_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-redeem-code-free_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
font_00_sfnt_off00002ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED1 22324 bytes
SHA-256: 7fd2f7ca6a320449a7daeb129428c6959e6c2baef5ed498381dc52d20fab5bf1
font_01_sfnt_off00006094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6094 19348 bytes
SHA-256: 4ae2c389243f3b623ac8168c3d7900f8b85d1381a5658595fe5dfc196a02db1b

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