Malicious PDF — malware analysis report

Static analysis result for SHA-256 905cf923593c6ee8…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 07:12:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bda5a9b1a8441118cbaf21a1920ed81b SHA-1: afd3f0cabd990518871cd85df1a427b733bf6ddd SHA-256: 905cf923593c6ee8447f749fd8006ad09ce23f07d6b84abec1ffb6f4bc4c2109
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL is https://netcdn.online/app/431946152/camecards-for-roblox-robux-free-sent-to-email-no-surveys-game-hack. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/camecards-for-roblox-robux-free-sent-to-email-no-surveys-game-hack In PDF document text
    • https://new-era.com.tw/image/data/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/game-coin-master-hack_GM406889139.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
stream_004_off000050ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50EC 28276 bytes
SHA-256: f9595c46d4d23b9888b0080c84b169836a8430822e3b581e34517c6a42f9b24a
font_01_sfnt_off00009129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9129 19268 bytes
SHA-256: 8195873f0c58641bc4da2e98a982f1a1e6d2e7778c13798f3996963fc406b5ed

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