Malicious PDF — malware analysis report

Static analysis result for SHA-256 48281b846b90e983…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 19:51:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 692263fa494c6a80cf3143dad359d176 SHA-1: ede10357be07d712b5a867ba6fe060add3d7c2a1 SHA-256: 48281b846b90e9837b9f2f37094709c41f3f0a880fcbdee88856bca04d68d010
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links and a document body that promotes free game items and hacks, indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports this assessment. The primary IOC is the URL http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-2021-game-hack, which likely serves as the download source.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/how-to-get-minecraft-for-free-2021-game-hack PDF link annotation
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/play-free-online-games-roblox_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/roblox-free-studio-build_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/best-free-online-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/avatar-the-last-airbender-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/can-you-make-free-clothes-roblox_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/open-coin-master_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-robux-codes-no-verfacation_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/roblox-piano-hack-download_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/roblox-generator-free-dowload_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_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_off000032dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DD 22432 bytes
SHA-256: 9a45b32a21f6fff68b0ce540b684ea652c7a65c8703e7401a0ffbfd49d5ee1a9
font_01_sfnt_off0000647b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647B 18564 bytes
SHA-256: 43dd555449d761b16fa14d8344754828fb7f7a396a9ff789ff9c30084ddefd43

Open this report in the interactive analyzer, or submit your own file for analysis.