Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f20476431fe7b4…

MALICIOUS

PDF

42.1 KB Created: 2021-05-21 12:32:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c06858ada0fd2c6da273bc1bffefdba8 SHA-1: 7bb44f43b51b276f334896a30054bd647eb06b16 SHA-256: 85f20476431fe7b42c3fcb185b9f01eef763b900e4f995d6153686564c7c7451
82 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, and the document body includes phrases like 'CLICK HERE TO ACCESS ROBLOX GENERATOR' and mentions a password for an archive. These elements, combined with the ML classifier flagging the PDF as malicious, indicate a phishing or social engineering attempt to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7864

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.xyz/app/431946152/roblox-free-login-game-hack PDF link annotation
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000335e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x335E 24740 bytes
SHA-256: 537d605504df8e48a412d94bc10229d2d7bbabce53165c3d6940bf3460222c3e
font_01_sfnt_off00006c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C16 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000075c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C1 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off000082d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D3 18356 bytes
SHA-256: a8d26950e0e2eef33b27b6c10906646661cb910c2bf8a097fd7ed42515788ae2

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