Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33cc857948b97ae…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 05:43:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c14db6a5ca348abee9e6753c9c3d7053 SHA-1: 2688fa51e8324ed27da49da74cc79f32ef150268 SHA-256: b33cc857948b97ae9b4f02afeac9502591cfefd97b890b0da1ea3a54e36cc5ae
102 Risk Score

Malware Insights

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

This PDF document contains numerous links disguised as 'free Robux' or 'game hacks', indicating a phishing or scam attempt. The heuristic PDF_SEO_LINK_FARM suggests a large number of these links are present, likely to direct users to malicious websites. 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/free-robux-codes-2021-real-game-hack
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/roblox-free-clothes-girl_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-by-watching-ads_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-just-click_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/hack-money-lumber-tycoon-2-roblox_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/roblox-rape-hack_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/roblox-exploit-gui-free_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/games-like-coin-master-for-free_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-stuff-on-roblox-2021_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/roblox-murder-mystery-2-halloween-hack_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-hack-game-download-mod-apk_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/free-robux-videos_GM431946152.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-hack-app_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/coin-master-game-hack-app-download_GM406889139.pdf
    • http://elearning.madagresik.sch.id/__statics/gudangsoal/files/become-vip-roblox-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e88.bin
f7fc8edacbfa549d9397de0180697fb97a29515ee4a8e7a27cbd0512c4bb608e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E88 22076 bytes
font_01_sfnt_off00005f9d.bin
58b5540d62ffcbcd0cd09a8102d97fc092b94db7ea089f1030660d7870c6f7c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9D 19364 bytes

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