PDF malware analysis — malicious · 79f21ffaeff77e58

MALICIOUS

PDF

43.3 KB Created: 2021-05-17 05:42:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 6cff0d0bb1e314bb9aafdec7b26af04b SHA-1: 7b33b34d74e97fc7cbd7453a5e8a1b8d87fe07e7 SHA-256: 79f21ffaeff77e5807dec7b81a8d5ab46c75e5e6bf7a3e304c7200f3bcee12b4

62 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on suspicious domains and promise game-related cheats or hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a callback lure heuristic suggests a phishing or scam attempt. While no scripts were explicitly extracted, the document's structure and content indicate it's designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/how-to-hack-roblox-accounts-on-phone-2021-game-hack
- http://umksn.pl/images/roblox-zone-free-robux_GM431946152.pdf
- http://umksn.pl/images/how-to-win-free-robux_GM431946152.pdf
- http://umksn.pl/images/free-custom-minecraft-skins_GM479516143.pdf
- http://umksn.pl/images/coin-master-hack-apk_GM406889139.pdf
- http://umksn.pl/images/free-minecraft-skins-java_GM479516143.pdf
- http://umksn.pl/images/get-free-robux-2021_GM431946152.pdf
- http://umksn.pl/images/unlimited-free-spins-coin-master_GM406889139.pdf
- http://umksn.pl/images/buy-robux-free_GM431946152.pdf
- http://umksn.pl/images/coin-master-free-spin-and-coin-links_GM406889139.pdf
- http://umksn.pl/images/how-to-play-coin-master_GM406889139.pdf
- http://umksn.pl/images/free-robux-generator-com-roblox-hack_GM431946152.pdf
- http://umksn.pl/images/free-robux-link_GM431946152.pdf
- http://umksn.pl/images/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdf
- http://umksn.pl/images/roblox-bloxburg-hack_GM431946152.pdf
- http://umksn.pl/images/coin-master-free-coins-cheat_GM406889139.pdf
- http://umksn.pl/images/how-to-get-free-robux-instantly_GM431946152.pdf
- http://umksn.pl/images/robux-hack_GM431946152.pdf
- http://umksn.pl/images/coin-master-hack-version-apk-download_GM406889139.pdf
- http://umksn.pl/images/how-to-cheat-in-roblox_GM431946152.pdf
- http://umksn.pl/images/roblox-free-bundles_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000496e.bin` `5d3896148040f65d0c3dc7758346257754d52de88e5e95e9c22d598cb05faab8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x496E	26064 bytes
`font_01_sfnt_off000083a2.bin` `ee3ccdf346fecf17211ec9caf874d857695d657b5f92e2b1f0fe00576c016ffb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83A2	19312 bytes

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