Malicious PDF — malware analysis report

Static analysis result for SHA-256 330941104d6826c2…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 04:54:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ac66a40a02adcd5c1be8407c85257cc1 SHA-1: 9787db26cc363ef03c8982680b3b17a985515292 SHA-256: 330941104d6826c236ff556065409b3c4f70af04cc1090b2531dfb6fb2d55486
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which are SEO-optimized and point to sites offering 'free' in-game currency or items for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the 'ML_NYX_PDF_MALICIOUS' score is very high. The document body and extracted URLs suggest a scam or phishing attempt designed to trick users into visiting malicious sites.

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/406889139/free-coin-master-links-game-hack
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-vip-server-in-roblox_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/cmo-hackear-el-roblox-para-tener-robux-en-un-mvil_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/roblox-for-free-no-password_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/awesome-free-roblox-outfits_GM431946152.pdf
    • http://digilib.stimlog.ac.id/repository/http-appsmob-info-coin-master-hack_GM406889139.pdf
    • https://digilib.stimlog.ac.id/repository/how-to-get-bloxburg-on-roblox-for-free_GM431946152.pdf
    • http://digilib.stimlog.ac.id/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdf
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • https://digilib.stimlog.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdf
    • https://digilib.stimlog.ac.id/repository/how-to-get-50-free-robux_GM431946152.pdf
    • http://digilib.stimlog.ac.id/repository/free-spin-appscoin-master_GM406889139.pdf
    • https://digilib.stimlog.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdf
    • https://digilib.stimlog.ac.id/repository/free-robux-no-verification_GM431946152.pdf
    • http://digilib.stimlog.ac.id/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdf
    • https://digilib.stimlog.ac.id/repository/how-do-u-get-roblocks-on-roblox-for-free_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/tiktok-for-free_GM835599320.pdf
    • https://digilib.stimlog.ac.id/repository/connection-free-mail-roblox_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/roblox-adopt-me-free-pets_GM431946152.pdf
    • http://digilib.stimlog.ac.id/repository/free-robux-wheel_GM431946152.pdf
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030fd.bin
44ec8a99ed9a61fb8b2bbe10180a927aca2abef2ab8e4fab13a1d693d5a5d4bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30FD 23056 bytes
font_01_sfnt_off00006484.bin
8de0148014db431be508c837079dea1fd88eb4d3bf9aad0e575fcfb6a46af486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6484 18168 bytes

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