Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd4fe9a015479ff…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 10:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cfeb5d28e76e0e062afb6a33146f089f SHA-1: a9dd9cb4095b89ab1688e7290398a14388698bf3 SHA-256: cdd4fe9a015479ffedb3d7c3350756568baf25029f7e1a8e5223b81587655a85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically a site offering 'free Robux' or game hacks. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of a redirector lure. The document body and embedded links suggest a social engineering attempt to trick users into visiting a potentially harmful site.

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/give-free-robux-game-hack In PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-robux-for-free-2021-easy_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/artmoney-pro-roblox-free_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/corn-master_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/pastebin-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/hack-roblox-phantom-force_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-item-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-codes-no-verification_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
font_00_sfnt_off000032e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E2 22440 bytes
SHA-256: a8f6c48bb8efbcdbb0d94681b219a32543cb6e344d90c88c68858051e8446614
font_01_sfnt_off000064eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EB 18952 bytes
SHA-256: 099c16aecc59e05ee2a67675ac57707afb633d1d3f2ee222ad3cc0024ed5c63f

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