PDF malware analysis — malicious · 9ed3b7afccd41a7d

MALICIOUS

PDF

41.4 KB Created: 2021-05-10 23:03:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 7849d7fe66da2459b8154d3b56a50004 SHA-1: dd2d4307259fd4674e6fec4c17c54816e31e5d1d SHA-256: 9ed3b7afccd41a7db8d5dfc0fe0ad56565fb43d2e67461dff3e75671982702a6

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, including one identified as algorithmically-generated and potentially malicious. The ML classifier also flagged this PDF as malicious. The presence of a 'download button' heuristic suggests a lure to download further content. The document body, though heavily corrupted, contains references to 'Bux Free Robux', indicating a potential scam or phishing attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 4

PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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/bux-free-robux-game-hack
- https://www.imagevideo.info/images/roblox-controversy_GM431946152.pdf
- https://www.imagevideo.info/images/master-free-spin_GM406889139.pdf
- https://www.imagevideo.info/images/coin-master-free-spins-without-human-verification_GM406889139.pdf
- https://www.imagevideo.info/images/roblox-games-free_GM431946152.pdf
- https://www.imagevideo.info/images/kachifpro_GM406889139.pdf
- https://www.imagevideo.info/images/free-robux-codes-2021-not-used_GM431946152.pdf
- https://www.imagevideo.info/images/robux-generator-no-human-verification_GM431946152.pdf
- https://www.imagevideo.info/images/free-coins-on-coin-master_GM406889139.pdf
- https://www.imagevideo.info/images/blogspot-coin-master-free-spins_GM406889139.pdf
- https://www.imagevideo.info/images/coin-master-free-spins-hack_GM406889139.pdf
- https://www.imagevideo.info/images/coin-master-time-hack-ios_GM406889139.pdf
- https://www.imagevideo.info/images/roblox-money-hack_GM431946152.pdf
- https://www.imagevideo.info/images/how-to-get-free-items-on-roblox_GM431946152.pdf
- https://www.imagevideo.info/images/roblox-hack-com_GM431946152.pdf
- https://www.imagevideo.info/images/coin-master-free-gold_GM406889139.pdf
- https://www.imagevideo.info/images/no-robux_GM431946152.pdf
- https://www.imagevideo.info/images/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdf
- https://www.imagevideo.info/images/free-coins-app-for-coin-master_GM406889139.pdf
- https://www.imagevideo.info/images/free-robux-generator-no-survey_GM431946152.pdf
- https://www.imagevideo.info/images/get-robux-for-free-2021_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000461f.bin` `0d63e78e81b50eb06a233dfe5da3a50ffbf69dea2abd3407ffb5a15232817470`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x461F	25464 bytes
`font_01_sfnt_off0000805e.bin` `48dadac1a540eb24f39d188e0eb07df2fd2c4cea4184d8a92cbd726ce4786484`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x805E	18012 bytes

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