Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b742f04580c81cd…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 02:26:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ffba1138b60d2f345f9dffbe56115d64 SHA-1: c64f004f7f7cfed541b96d10fa048489699c6d7a SHA-256: 0b742f04580c81cda3ba84521de0a89f8e6c682023dea423668b4ad84a2af5ca
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes free Robux and game hacks, indicating a phishing or scam attempt. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of external links were generated, likely to direct users to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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/431946152/robux-online-game-hack
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-free-robux-gift-cards_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-minecraft-skins-pc_GM479516143.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-spin-generator-for-coin-master_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-spins-for-iphone_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/kuso-icu-roblox-hack_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-free-points-in-get-eaten-roblox_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-robux-survey_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/sondage-for-free-robux_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/hack-version-of-coin-master_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/easy-robux-today-com_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/adopt-me-roblox-building-hacks_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/minecraft-free-trial_GM479516143.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/com-roblox_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-free-robux-fast_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-hack-lost-world-2021_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/roblox-exploits-hack-one-piece-millennium-roblox_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-spins-coin-master-facebook_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e09.bin
b676d6ee92c61522d797875bfe7fa4126554b6d7528b02986b021581a0e6c467		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E09 22824 bytes
font_01_sfnt_off00006118.bin
0d65403b238a7007715d414cecaabb3c72f82c70eaf60aa0c41e152bd513deae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 18744 bytes

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