Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94f7d5529bab400…

MALICIOUS

PDF

45.4 KB Created: 2021-06-08 23:01:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d1f5ec17ce2b26d9d16cd917a12cd715 SHA-1: 6c014b5a0badd1d5fdbd884171b7467dca8e4c7d SHA-256: b94f7d5529bab400fece480c98a039b8b0e4dc2a1bb606f53656ea49f35fda00
108 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and text that lure users with promises of free in-game items, such as 'Robux' or 'Minecraft'. The primary link, https://netcdn.tw/app/431946152/jack-hack-robux.com-game-hack, is flagged as a malicious redirector. The document's structure and content strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/jack-hack-robux.com-game-hack In PDF document text
    • https://alimi.com.tw/upload/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/tiktok-free-folowers-4tiktok-site_GM835599320.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/pokemon-go-free-83_GM1094591345.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-coin-master-spins-2021_GM406889139.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
stream_004_off00005267.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5267 25652 bytes
SHA-256: 5b69dd7d42fd8f9fc9d870ccd50cdaade8e5089952ce77c5d2e7243bbb554898
font_01_sfnt_off00008d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9B 18740 bytes
SHA-256: cba7a4e493139ccb2be0bfd558470900f1b59e3ca862e4c22f39113000dcfb45

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