Malicious PDF — malware analysis report

Static analysis result for SHA-256 22bd18debfa8003a…

MALICIOUS

PDF

33.5 KB Created: 2021-06-19 04:31:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ecd74d66827b584366dbeda9b9e85541 SHA-1: a2e25a53b71011abe1823c40b97087436aa5b234 SHA-256: 22bd18debfa8003ac2f4f489328105ce83808cdef85b0e1c76d7a5344e64c219
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/free-gift-code-roblox-game-hack. This lure is designed to trick users into believing they can obtain free game items or hacks, likely leading to a further malicious download or phishing page. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/free-gift-code-roblox-game-hack In PDF document text
    • http://www.gadanie.lv/images/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://www.gadanie.lv/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gadanie.lv/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.gadanie.lv/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/spring-flowers-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/free-robux-generator-with-human-verification_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/cool-accessories-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/roblox-robux-cheat-pc_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://www.gadanie.lv/images/cheat-codes-for-roblox-mad-paint-ball_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://www.gadanie.lv/images/free-robux-generator-exe_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/roblox-hack-2021_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_off00002e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5E 21660 bytes
SHA-256: c245ec1245443ed077512ab56b700959721b8a193d12c5bce64feb03d1e36cb2
font_01_sfnt_off00005e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2F 18864 bytes
SHA-256: 284df1bb09c16c547d6292923a2be24487b499ca0645c7b113e18e6f231e8434

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