Malicious PDF — malware analysis report

Static analysis result for SHA-256 48757f232161bcce…

MALICIOUS

PDF

36.3 KB Created: 2021-06-28 21:52:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 63f90d745799f4e5662c136d07214bde SHA-1: d68e46c508db12cc5f3f5d301d9ac2afbd44fde0 SHA-256: 48757f232161bccefdc9914f8cf8acb0b2fa1f3217dfa94071c5367c78fe67ac
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious due to its structure and embedded links. It contains a large number of external links, many of which are SEO-optimized and point to pages offering 'Free Robux' or game hacks, indicating a lure for potentially unwanted or malicious downloads. The presence of an embedded URI and the ML classifier's high confidence score further support this assessment. No scripts were extracted, but the document's primary function appears to be directing users to external resources.

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/free-robux-free-2021-game-hack
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-accounts_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-can-you-hack-robux_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/play-minecraft-online-free_GM479516143.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-robux-cheat-engine_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-hack-steal-accounts-on-roblox-apex_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes-unused-2021_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-car-speed-hack-script_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-hack-into-other-roblox-accounts_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-december_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/cheate-engine-addres-for-robux_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/robux-hack-generator-no-download_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/hack-for-all-games-roblox_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-hack-script-vehicle-simulator-infinite-money-script-free_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/roblox-free-roblox-card-codes-2021_GM431946152.pdf
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/minecraft-java-free-account_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003588.bin
eae102812a8c3e8a3c0b69abe36d324b25afa8677236ed0b4f844c85514449eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3588 22780 bytes
font_01_sfnt_off00006881.bin
bd102244ffb40c6add567cd3640126a26b927334c4b0bdc73f6a542841550b4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6881 19116 bytes

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