Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2bb391f1c82dfb…

MALICIOUS

PDF

34.9 KB Created: 2021-06-24 04:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1b97ea49b048670017c548fe5487b17e SHA-1: 34960bc42a551079289375c923823ed3f8f03184 SHA-256: ca2bb391f1c82dfb953efa554e34fd20985d1ba772e36467549862a4fe7f3bcd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.co/app/431946152/free-robux-no-download-game-hack PDF link annotation
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-coin_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-upload-multiple-music-to-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/www-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-no-login-free-play_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000312c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312C 22196 bytes
SHA-256: cdbba9f5308b49a8f58357e4e491f5e2191b755debb948885285061cf5ba7233
font_01_sfnt_off000062b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B0 19296 bytes
SHA-256: 673f58843918fec7fc82dc93eb19a7c859fa60c1e628ed96b3248d818383844d

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