PDF malware analysis — malicious · b5af40f972a1d339

MALICIOUS

PDF

42.0 KB Created: 2021-05-19 04:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: dd7067ae4937046de97e017ff9247438 SHA-1: fa6bc4e69f5381779835677f29dee8809ee141c1 SHA-256: b5af40f972a1d339f8f753ade9237e1f7996a221ed8e83cacee08f56afe27296

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/1094591345/coins-for-pokemon-go-free-game-hack PDF link annotation
- http://juscor.com.br/ckfinder/userfiles/files/wurst-client-download_GM479516143.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/i-want-free-robux_GM431946152.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/coin-master-cheat-free_GM406889139.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
- http://juscor.com.br/ckfinder/userfiles/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.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_off00004ad4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4AD4	24536 bytes
SHA-256: `349d1ad4898769f4a420254d76e72e62c48fc4d349ad1daf4aaf595b40330e55`
`font_01_sfnt_off0000830a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x830A	17960 bytes
SHA-256: `53192175c8c50e23e3a31f5ce2b246cab909bc350f50d1defd1a0d9f7309e3e7`

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