Malicious PDF — malware analysis report

Static analysis result for SHA-256 86978090d8629ce0…

MALICIOUS

PDF

35.5 KB Created: 2021-06-27 03:21:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 93c73e7ce891662086a32ce40f67f0ed SHA-1: c934385ae3ffe8e13c75d24f11b36405ab7fb84d SHA-256: 86978090d8629ce07d3ef7a86f9f84530a6e8efdec0fae4d7e6379f2dd7b35c9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that are part of a link farm, likely designed to lure users into downloading malware by promising free game currency or hacks. The ML classifier strongly indicates maliciousness, and the presence of external URIs and a link farm heuristic confirms the malicious intent. No scripts were extracted, but the document body and heuristics point to a phishing or malware distribution attempt.

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-without-paying-game-hack
    • http://daskrimti-jabar.web.id/library//repository/daily-free-spin-coin-master-link_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/roblox-nike-shirt-template-free-shipping_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/minecraft-java-edition-free-trial_GM479516143.pdf
    • http://daskrimti-jabar.web.id/library/repository/how-to-cheat-on-dragon-ball-rage-roblox_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/rbxcity-free-robux_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/royale-high-roblox-dresses-free-glowing-beach-skirt_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/free-robux-for-kids-no-verification_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/coin-master-apk-hacked-3526_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spins-may-11-2021_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-robux-java-script-pastebin_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-bloxburg-for-free-without-robux_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library//repository/free-robux-pins_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/roblox-booga-booga-hack-download-2021_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/buy-robux-free_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/androeed-ru-minecraft_GM479516143.pdf
    • http://daskrimti-jabar.web.id/library/repository/get-free-robux-2021_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdf
    • http://daskrimti-jabar.web.id/library/repository/roblox-rape_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003162.bin
d3613f928ebb178b0ebda09aa44d12b0f9a1c89f5b9bc8946aafc3eaabba4a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3162 22744 bytes
font_01_sfnt_off0000642f.bin
2fc263916884baf8fe37cccad3ff0c936a6d71c1010ae962380907f730b0afe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 19640 bytes

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