Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dce558beaf1d165…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 20:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d32f7eb50d93512126cd807d216d545e SHA-1: 7d62d4338ade2298e0910365c759b1a3b61210ab SHA-256: 5dce558beaf1d16557fbe78319448021530d8c993ac93600e06bd959a4627426
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a specific external URL, all related to obtaining free Robux or game hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the nature of the links and the document's content strongly suggest a phishing or scam attempt to lure users to malicious websites.

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.tw/app/431946152/game-give-free-robux-game-hack
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/cute-free-stuff-on-roblox_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-robux-hack-without-human-verification_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/how-to-get-hacks-for-roblox-jailbreak_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/free-robux-hack-no-verification_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/roblox-pokemon-brick-bronze-hacked_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/roblox-game-guide-tips-hacks-cheats-mods-apk-download_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/how-to-turn-in-to-super-sayin-roblox-no-hacks_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/free-protosmasher-whitelist-key-roblox_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/free-robux-hack-sheet_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/roblox-hack-me-free-robux_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/rbxfree-com-free-robux_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/free-robux-pin-codes-paste-bin_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/roblox-but_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/robux-converter_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/roblox-robux-hack-no-download-no-survey-2021-working_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/free-free-robux_GM431946152.pdf
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id/repository/free-roblox-exploits-unpatched_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032e8.bin
d08d9efdfea57d5fcb13e634ad19629b46e2de6dcc88dee30c116c162356dbed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32E8 22668 bytes
font_01_sfnt_off0000658b.bin
69813dd6a6bd245aee50b944f0193d6275a7494d00db293a689fcf826d12d1cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 19208 bytes

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