Malicious PDF — malware analysis report

Static analysis result for SHA-256 663061d4dc16c760…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 20:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 870b0fc6b20103015c7d6dbf4025e850 SHA-1: e62584c3c13f44f261bdee21578367cb95ef1d5b SHA-256: 663061d4dc16c76047ef69b2a24d31c3b4aa2b490aaa7fae8ce1227470beae01
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes free in-game currency for popular games, acting as a lure. The heuristic firings indicate a link farm designed to direct users to external sites, likely for downloading further malicious content or engaging in scams. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

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/how-to-get-free-robux-without-downloading-any-apps-game-hack
    • http://libsmpn1balongpo.sch.id/repository/cheat-engain-mac-for-roblox_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/how-to-get-robux-for-free-2021-easy_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/roblox-com-get-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-gen_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-easy_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/hacks-de-roblox-para-cualquier-juego_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id/repository/how-to-hack-in-games-roblox_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-coin-master-spins-link_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-34-4-hack-download_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-faces-on-roblox_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/clean-master-coins-hack_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/daily-free-spins-coin-master_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-mod-apk_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id/repository/how-to-get-free-roblox-on-the-river_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-download_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-game-pack-with-google-play-coin-master_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-hack-a-minecraft-account_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id/repository/how-to-hack-roblox-players-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000317a.bin
9602a19c494b4b77cea128b0b7c674f6b3181c2677622157fe531ea357e23cd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x317A 22352 bytes
font_01_sfnt_off0000633d.bin
297e40e48bf98f909157546786ed8ef6c846caf78719244298106c3264496c18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 20240 bytes

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