Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f731e50f2ca6d4…

MALICIOUS

PDF

34.0 KB Created: 2021-07-01 18:18:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 03c519b7967aa381a893b19e0b604a5f SHA-1: fb2d1722a652752c40dcf6845cfbfa5ac4ba2cc0 SHA-256: 36f731e50f2ca6d487162f9e342697a81a36815822d59282f9229caa54257370
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The document body explicitly mentions 'Free Robux Generator' and related game hacks, aiming to trick users into clicking malicious links. The ML classifier also flagged this PDF as malicious with high confidence.

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-generator-game-hack
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/how-to-get-items-for-free-in-roblox_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/free-roblox-gift-card_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/best-roblox-hacks_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/sunset-coast-gui-roblox-hacks_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/how-do-have-a-speed-hack-in-robux-simulator-roblox_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-scam_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/coin-master-free-link-spin_GM406889139.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-catalog-2021_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/coin-master-free-spins-generator_GM406889139.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/robux-hack-generator_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/free-robux-no-verification-required_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/free-unlimited-robux_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/roblox-fly-hack_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/pokemon-go-free-wallhack_GM1094591345.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/master-coin-free-spin_GM406889139.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/roblox-roblox-hack-free-robux-generator_GM431946152.pdf
    • https://e.mtsn4tabalong.sch.id/__statics/gudangsoal/files/this-code-gives-you-1-billion-free-robux-instantly_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f10.bin
8a739e3ea9f4b308f5d388b41227a63f44932d10ec93250088b64a7112e99095		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F10 22180 bytes
font_01_sfnt_off00006058.bin
da2f915db23b41a878f83961178ff4e79d82bfec54ff52f4ca014625624765bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6058 18820 bytes

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