Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe969842a9c82436…

MALICIOUS

PDF

45.5 KB Created: 2021-05-13 16:30:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ee3084d96c31056a19083f6f6772d7f3 SHA-1: 36650de9bd8d0af556c8db3c88cc2a2162ec2b55 SHA-256: fe969842a9c824369267e59d1e3a6f691262d46f776ece2631de196a05b7b2ab
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to sites offering 'free Robux' and game hacks. The document body also contains similar lures and a call-to-action phrase, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/free-2021-robux-game-hack
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey_GM431946152.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/free-robux-on-ipad_GM431946152.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021-hack_GM406889139.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/free-robux-picture_GM431946152.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/minecraft-alt-accounts-free_GM479516143.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/coin-master-hack-no-survey-or-verification_GM406889139.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification-2021_GM431946152.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/robux-match_GM431946152.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/hack-coin-master-ios-download_GM406889139.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/free-minecraft-skins-girl_GM479516143.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/roblox-fun-com-free-robux_GM431946152.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/how-to-get-free-premium-roblox_GM431946152.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-jailbreak_GM406889139.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/coin-master-hack-version-download-2021-android_GM406889139.pdf
    • https://www.elearning.ma-alqasimiyah.sch.id/__statics/gudangsoal/files/master-free-spin-and-coin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a75.bin
6902c89be5ded6cea8881ef0f58b1a5ceecade64fa6d9b8271fe78532900cd3e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A75 25316 bytes
font_01_sfnt_off00008541.bin
fd98c8f6e7c2e74bbd5822409159a93ac5c94da083ae4c2eb269d4284375f9e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8541 2836 bytes
font_02_sfnt_off00008ee7.bin
24dd33113ad1920a4b79572916f2875f9d05bd64d95cc44e0cd438e20c1ad4df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE7 18416 bytes

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