Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d3a75990df9f44…

MALICIOUS

PDF

44.4 KB Created: 2021-05-16 22:21:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f0ee3176b1f8aad52cfc0561c27f72bf SHA-1: e0269556324ad50b882e42744662d569a565dbbc SHA-256: 33d3a75990df9f448cd785ec92f0092f50efb857c91ce8b415d8342a9686c399
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are related to game hacks and free in-game currency, indicating a link farm designed to direct users to potentially malicious sites. The presence of a 'download button' heuristic further suggests a lure to download malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest a malicious intent to redirect users, likely for credential harvesting or malware distribution.

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 https://netcdn.xyz/app/431946152/huskybus.com-free-robux-game-hack
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/coin-master-card-hack-apk_GM406889139.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox-install-free_GM431946152.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/coin-master-codes_GM406889139.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox-free-robux-codes_GM431946152.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox-hacks-2021_GM431946152.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/download-coin-master-apk-hack_GM406889139.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/worst-roblox-avatars_GM431946152.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/master-coin-free-spin-daily_GM406889139.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/minecraft-survival-hacks_GM479516143.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/bloxawards-com-earn-free-robux_GM431946152.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/mc-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bc4.bin
6d87f681dccd619f94713a2771160bc7e70ac2a0b0064b0c117673acb00af893		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC4 27596 bytes
font_01_sfnt_off00008a39.bin
6add98f93d6464e4673e157e466f8eac90a499b9ef5784f234ada041ea0169f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A39 18688 bytes

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