Malicious PDF — malware analysis report

Static analysis result for SHA-256 66aaf8d94c5106bf…

MALICIOUS

PDF

38.4 KB Created: 2021-06-21 02:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8764e06fbc71b8a313606bbc8e9d9e53 SHA-1: 6aa9a2ca23af3bc6b9ac720c6d4437d49f8385c2 SHA-256: 66aaf8d94c5106bfdc1085c85cc4cef2283997db1961f126eea141cf51b95058
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and text promoting game hacks, suggesting a lure for users to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a malicious intent. While no scripts were directly extracted, the document's structure and content indicate it serves as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/roblox-guest-0-hack-game-hack
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-robux-hack-2021_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/hacks-for-roblox-on-mobile_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/can-you-make-free-clothes-on-roblox_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/pokemon-go-free-move_GM1094591345.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-robux-without-doing-anything_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/can-u-get-free-robux-in-roblox_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/hack-coin-master-for-iphone_GM406889139.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/funbloxxyz-free-robux_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-2021_GM406889139.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-hack-com_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/coin-master-hack-android-2021_GM406889139.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/coin-mster-free_GM406889139.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/lazyblocks-com-robux_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/pokemon-go-free-account-2021_GM1094591345.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/easy-robux-com_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/how-to-free-robux_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/daily-free-spins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003e32.bin
00db531f259f827fa1bfffa4af3404ec00f14d62f0e3a77239edd83af3a36e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E32 22764 bytes
font_01_sfnt_off00007136.bin
8374c65f9675ae3cf2051ddda33776b2109d455e15fa7201afa4f2218b4e8bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7136 19072 bytes

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