Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbc313f7099536a…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 12:11:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eef6eac675d04b11073c31dd6d5044f8 SHA-1: 510509883801656e906e8cff029342b4d4e250c0 SHA-256: 8cbc313f7099536a4d74c95102869393b08da5e10208ece7dcf6f25368cda214
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier as malicious and contains numerous embedded links, forming a link farm. The document body and embedded URLs suggest a lure for users seeking free items or hacks for games like Roblox and Coin Master, likely leading to malware downloads. The presence of external URIs and a link farm indicates an attempt to redirect users to malicious sites.

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/roblox-meep-city-free-items-game-hack PDF link annotation
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/hack-de-roblox-sin-virus_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/obby-gives-you-free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/how-to-get-everything-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/login-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/roblox-hacks-no-down-load_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/sandra-how-to-get-free-items-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/roblox-hack-infinite-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://www.elearning.misalhasyimiyahjkt.sch.id/__statics/gudangsoal/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3077 22436 bytes
SHA-256: e7c0f41c636bfef05f4a534be56b5e5d6a5e08a86d0670318e0163c811d2af48
font_01_sfnt_off00006281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6281 19500 bytes
SHA-256: 6c424a893d7098088e122d5eb34a3488b5b380c613fd68e0e6e1cd448bf9ab9e

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