Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6aded9caa63d14a…

MALICIOUS

PDF

47.6 KB Created: 2021-06-11 02:54:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8652067be9fd86cfd0e2da28e4662da9 SHA-1: 3cf57cf81ba2a24d19638da0769fdcd8a64b6272 SHA-256: c6aded9caa63d14ab2b0f2828aa12c9fe1f1f417ee726547af041d9cb6053385
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to resources related to game hacks and exploits, suggesting a lure for malicious downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports this assessment. The document body, though heavily obfuscated, contains references to 'hack' and 'game', aligning with the observed link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/roblox-wikipedia-2021-hack-game-hack
    • http://grugliascogiovani.org/images/roblox-exploit-razzberry-and-tools-hack_GM431946152.pdf
    • http://grugliascogiovani.org/images/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdf
    • http://grugliascogiovani.org/images/coin-master-free-spin-generator-without-human-verification_GM406889139.pdf
    • http://grugliascogiovani.org/images/www-claim-gg-to-earn-free-robux_GM431946152.pdf
    • http://grugliascogiovani.org/images/is-it-possible-to-get-free-robux_GM431946152.pdf
    • http://grugliascogiovani.org/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://grugliascogiovani.org/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdf
    • http://grugliascogiovani.org/images/strucid-aimbot_GM431946152.pdf
    • http://grugliascogiovani.org/images/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://grugliascogiovani.org/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://grugliascogiovani.org/images/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://grugliascogiovani.org/images/coin-master-freebies_GM406889139.pdf
    • http://grugliascogiovani.org/images/minecraft-pc-free_GM479516143.pdf
    • http://grugliascogiovani.org/images/earn-robux-online_GM431946152.pdf
    • http://grugliascogiovani.org/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://grugliascogiovani.org/images/free-likes-on-tiktok_GM835599320.pdf
    • http://grugliascogiovani.org/images/free-50-robux_GM431946152.pdf
    • http://grugliascogiovani.org/images/free-spins-for-coin-master_GM406889139.pdf
    • http://grugliascogiovani.org/images/minecraft-reach-hack_GM479516143.pdf
    • http://grugliascogiovani.org/images/coin-master-hack-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005093.bin
bf097aafddaa0e293fd9a216d7632a4ca2abee558867c58381263c517b965251		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5093 24976 bytes
font_01_sfnt_off00008a3f.bin
c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3F 2892 bytes
font_02_sfnt_off00009429.bin
f4587e56468d654dfab8dd2bed24ff1b4dd4897a2679f1879715dd6e15e587b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9429 19252 bytes

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