Malicious PDF — malware analysis report

Static analysis result for SHA-256 7269f6a8432fbe73…

MALICIOUS

PDF

48.5 KB Created: 2021-06-09 10:24:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 440e1e5a88f97d0d94328e3453b01622 SHA-1: 0c92cbb85b79a9d291294eaa27dc13c1ea188ba2 SHA-256: 7269f6a8432fbe73f052cc0acaf5fe2cefe9ae9dd773298584e73ccca6edc858
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, identified as a link farm, likely intended for SEO manipulation or to distribute malicious content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a 'download button' lure further supports this. No scripts were extracted, but the overall structure and URL patterns suggest a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/lego-hacking-roblox-game-hack
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-daily_GM406889139.pdf
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/hack-crack-for-coin-master-currency_GM406889139.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/get-free-roblox_GM431946152.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-2021-download_GM406889139.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdf
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-facebook_GM406889139.pdf
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-hacks-for-coin-master_GM406889139.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/hack-coin-master-mod-apk_GM406889139.pdf
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-daily-rewards-link_GM406889139.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/roblox-hack-apk_GM431946152.pdf
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/how-do-you-get-minecraft-for-free_GM479516143.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-spin-27_GM406889139.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/oprewards-com-earn_GM431946152.pdf
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheats_GM406889139.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/hacks-minecraft_GM479516143.pdf
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-raid-link_GM406889139.pdf
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-unlimited-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005188.bin
e7210cc534793788790495c818d931371609c341bbf042e9d37494107b09d139		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5188 26608 bytes
font_01_sfnt_off00008d25.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D25 5596 bytes
font_02_sfnt_off000099cd.bin
77277fe1cceab0286050a251a6b5113bab66793d3a78bb89a6a4e3bae984a880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99CD 18592 bytes

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