Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afef1facce097b9…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 14:41:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 49cdeb819eef8d16cb72c7a5984f498f SHA-1: 5c4a8a6cabe1e6bca7f4567ef0ab41a0ccb2a636 SHA-256: 7afef1facce097b9beea19c812e03a44b1df85bf79bda69183942865a05aa1eb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and free items. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a 'download button' heuristic suggests an attempt to direct users to malicious content. The document's content and structure are consistent with a phishing or scam attempt designed to trick users into downloading malware or visiting compromised 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.co/app/431946152/how-to-make-clothes-without-hacks-or-bc-roblox-game-hack
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-free-spins-apk-2021_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-game-packs-for-coin-master_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/pubg-2021-uc_GM1330123889.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-minecraft-thumbnails_GM479516143.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/robuxy-com-free-robux_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/download-hacked-games-com-coin-master_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-game-hacking-tricks_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-cool-things-in-roblox-that-charecters-played_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-roblox-account-with-pin_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/cm-daily-spins_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-roblox-accounts-dantdm_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-apk_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-robux-websites-for-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fcf.bin
882b8731e9fe84fcc2f2751edc7fa8df5e860a3c887d78f068f19a07fd996ba8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCF 22532 bytes
font_01_sfnt_off00006254.bin
0b97f3a5b20125f74c276361b948d95bd205481ed6786bea3a36c6d9c5079201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6254 19744 bytes

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