Malicious PDF — malware analysis report

Static analysis result for SHA-256 02eccc0469c9251b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 22:52:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 424f7ebc3ca4037f716b67adb9d011ba SHA-1: a03833e97cdf2893c75945d12211999aaf9da919 SHA-256: 02eccc0469c9251bde7b8715c86a39071b5231697115f750b9fdfdcc1ba4ed01
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs promising free in-game currency for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the ML classifier strongly flagged the document as malicious. The presence of a call-to-action phrase further supports the lure.

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.co/app/431946152/ooby-give-you-free-robux-husky-roblox-game-hack PDF link annotation
    • http://www.manchieu.vn/upload/editor/files/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/youtube-how-to-play-roblox-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/hacks-for-the-legendary-sword-rpg-roblox_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/generator-for-free-password-roblox_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-gift-card-pins_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-send-a-trade-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-free-walk-animation_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/hack-for-project-sepra-roblox_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-robux-hack-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/minecraft-free_GM479516143.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_002_off0000308d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x308D 22348 bytes
SHA-256: 1e8c4347d095dd92132c513a0ccdd1c635b421a1344395881a1765cccc9b1aff
font_01_sfnt_off0000622b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622B 19536 bytes
SHA-256: 59a5dc3a37aaf673bef53dd7b8e5af806d3184b95cbbfa5bfd4208f7ef7e5bd4

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