PDF malware analysis — malicious · cd3c0c3ac59a2f11

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 04:08:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 032e1ce7bd54f5dfd12ded5d710cbdff SHA-1: 62a9288efb22cd01ec2b3e5b697963cfe7c2167c SHA-256: cd3c0c3ac59a2f119158cb432250c6fd8bf0c217abbc4c05177a61a1d3b32472

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 0.9980

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 http://netcdn.co/app/431946152/free-robux-website-games-game-hack PDF link annotation
- https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/roebucks-on-roblox_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/robux-free-legalement_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/cheat-roblox-rs-2021_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/has-roblox-been-hacked-2021-march_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/temple-free-roblox_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-hack-download-no-virus_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
- https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-make-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
`font_00_sfnt_off00003071.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3071	22720 bytes
SHA-256: `ed2b75f995883a7d9ae47052c20569a1bb6db5ec6ffa1c907eb1249a0ac0e985`
`font_01_sfnt_off0000635c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x635C	19400 bytes
SHA-256: `09ac1f6577cb80f80c08f0072228a5457b1552c5ab2e0758a48d98e50075cbb9`

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