Malicious PDF — malware analysis report

Static analysis result for SHA-256 167c7ad2e8f37867…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 17:50:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 02bf85c13aa51a1863c313d8744fdea4 SHA-1: 9245188493195e9ffcc80e31be7ac0078e49882b SHA-256: 167c7ad2e8f378678663cd7c482b6ca3a0b00f06ff08682069a0bae0edb7ea9b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/roblox-sonar-studios-dragon-adventures-cheats-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful sites. The ML classifier also flagged this PDF with high confidence.

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/roblox-sonar-studios-dragon-adventures-cheats-game-hack In PDF document text
    • https://ezgolfer.com.tw/image/data/files/original-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/arsenal-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/all-free-roblox-2021-accessories_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-free-robux-2021-inspect-element_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_off00003011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3011 22504 bytes
SHA-256: 94edd9292fc940adc4e07cc41b86d1ac9d5c065087acd4c3f1bd945b26bb999f
font_01_sfnt_off00006248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6248 19472 bytes
SHA-256: 7ac8fdb61ab5ce4cdff41231bfc759db94c4db1c649930bf40293dc965299e42

Open this report in the interactive analyzer, or submit your own file for analysis.