Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a617dfa6c4cc60…

MALICIOUS

PDF

34.8 KB Created: 2021-06-26 20:49:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b61b95ef5e8052944cebdce5ff9ec982 SHA-1: b0376127549e899f0f8c0d56aa39776e137f749c SHA-256: 59a617dfa6c4cc608f51eea74e2045e67d0d69c859309799e08527c63e91690c
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a "doc body" that promotes hacks for popular games like Roblox and Coin Master. The heuristic "PDF_SEO_LINK_FARM" indicates a large number of external links, suggesting a link farm designed to attract users searching for cheats. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves luring users to download potentially malicious files or visit malicious websites via these links.

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.co/app/431946152/pastebin-robux-account-hack-2021-game-hack PDF link annotation
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/robux-gratis-funciona-hack-sin-cortes-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnegeri1ende.sch.id/__statics/gudangsoal/files/robloxheroxyz-free-robux_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_off00002fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD4 22272 bytes
SHA-256: c012614048987fe39566052e50c83964f117a44dbaea81d1608ca853bac1614e
font_01_sfnt_off0000615b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615B 19504 bytes
SHA-256: 55aba62d17d1a7f9500757c002c92247efe84b0477546a5c3df27bc149856d43

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