PDF malware analysis — malicious · 4bcb52e9996a9d8e

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 12:18:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: def79c68779c9d609b0a9acc0c516034 SHA-1: ea3e24d3629889c279240ac927e2ccdfbbc9f2c8 SHA-256: 4bcb52e9996a9d8ef49aca5413e70886e16ed80a5f0993a92bc4abb506cc7f7b

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 4

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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/free-robux-websites-that-actually-work-game-hack PDF link annotation
- https://www.sarsen.net/uploads/files/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/krnl-download_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/www-robux-us_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/robux-hack-me_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-spins-2021_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-free-account_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-robux-quiz_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004726.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4726	24448 bytes
SHA-256: `df5c7a60b4e9267dc2589530663aa3729ada8b88353ce204e4843e2886a056f0`
`font_01_sfnt_off00007f48.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F48	19252 bytes
SHA-256: `f49525d2cb353299e95430044cca9c62699809686ebb763340304ea0e82a2cbb`

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