Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba0aa8f99d59af2…

MALICIOUS

PDF

34.6 KB Created: 2021-06-25 20:49:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: af09323f5ba0a7bb2e963589d6254fc0 SHA-1: f4dbf3d71752b55540a3844affed437967acd47c SHA-256: eba0aa8f99d59af20516f03ad9dbdb3414ed303dddb9b47dbf62176dedf17424
62 Risk Score

Malware Insights

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

The document contains numerous embedded URLs and a document body advertising 'Free Robux' and game-related hacks, strongly suggesting a lure for users to download or click on malicious links. The ML classifier also flagged this PDF as malicious with high confidence. The presence of multiple external URIs and the overall theme point towards a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/free-robux-com-hack-game-hack
    • http://www.callong.cn/uploaded_files/userfiles/files/moonactive-coin-master_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-spins-october-28-2021-coin-master_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/mcpe-com_GM479516143.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/rbx-gg-free-robux_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/roblox-emergency-response-liberty-county-free_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-minecraft-server-maker_GM479516143.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-free-robux-in-brawl-stars-2021_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-account-that-has-robux_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/roblox-cheat-glitch-jailbreak_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-hack-roblox-assassin_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-apps-that-work_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/robux-hack-free-robux_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-free-spin-2912-2021_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/hacking-apps-for-roblox_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-free-2021_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-hacks-reddit_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-codes-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000309c.bin
4706858ff800a1ddd93b2b7c3317759b38b2b45fb9370f830669154a379be364		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x309C 22292 bytes
font_01_sfnt_off0000621c.bin
68cd3029941c68a19a183eded1daaf8ad3c5a3625ff20141cf4f7ab4671ec0b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 19148 bytes

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