Malicious PDF — malware analysis report

Static analysis result for SHA-256 2678d162b1007c40…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 06:11:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aafbb3e97c768b34cb4034368d663850 SHA-1: 6aff4d036b9ce4adc82d35fa1822a130b45f7e7f SHA-256: 2678d162b1007c402222603668b80868c656b7aaf468901ac03b184dac9c1dd8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically promoting 'free generator / game hack' lures for popular games. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-daily-free-spins-link-2021-game-hack. This indicates a social engineering attack designed to trick users into visiting potentially malicious websites. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or scam 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.tw/app/406889139/coin-master-daily-free-spins-link-2021-game-hack In PDF document text
    • http://energyx.com.tw/image/data/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/axe-hack-roblox_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/scratchyofficial-free-roblox_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-get-free-jailbreak-money-roblox_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/tutorial-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/how-to-get-free-robux-on-ipad-no-password_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/100-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/what-tiktok-free-robux_GM835599320.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-roblox-hack_GM431946152.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_002_off00002ec6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EC6 22416 bytes
SHA-256: 0621f197f46ecbff7e43f22af74b7fc34676c67bdbb05b831ff0e4756a9d0c44
font_01_sfnt_off0000609c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609C 19168 bytes
SHA-256: 84c37497ea3199e4eb4935d9e68ab24163eb72568577da040a17a4be5b808e19

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