Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfc055fe485d910…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 10:43:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ff79a385bd18b4242db1ed840368c96b SHA-1: 6a49ff70ecc8256c70a6f6754d911d99a4b025a6 SHA-256: bbfc055fe485d910a3c8a5f928d4e757dfa86ac7a0c7383b46141e263a806f93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as free generators and hacks for popular games. The primary lure is the URL http://netcdn.tw/app/431946152/roblox-speed-hack-game-hack, which is designed to trick users into downloading further malicious content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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/431946152/roblox-speed-hack-game-hack In PDF document text
    • https://cfla.gov.lv/userfiles/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/free-roblox-accounts-with-robux-2021-september_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/roblox-login-free-robux_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/roblox-hack-mining-simulator-rebhirt_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/how-to-hack-jailbreak-roblox-money_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/fre-robuxe_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/free-roblox-admin-download_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/free-robux-and-premuim_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/coin-master-free-coins-app_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
font_00_sfnt_off00002fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD9 22408 bytes
SHA-256: 2d55ca30501abaf4ced5a80e0b4606967f85fc85e7db15745905d352bdbf548f
font_01_sfnt_off00006206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 19008 bytes
SHA-256: 0d35cfadd0fca3b252b73fcf83046c0556c80fc1b3ae89449d52291489f63b0a

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