PDF malware analysis — malicious · b6813cf30da65090

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 01:20:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 90ad4c1fefa5b34cf9ba485af34e7207 SHA-1: d9bb832b0a2dda8f38dc0b24304a4aec41b52f0e SHA-256: b6813cf30da65090b9e5d076522d615b3045c5ab71946ab45174dcfcb11d6c74

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, primarily offering 'free Robux' or game hacks, which is a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the presence of numerous suspicious URLs suggests the document is designed to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

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.tw/app/431946152/free-robux-working-game-hack PDF link annotation
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/if-you-buy-this-you-can-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/how-to-get-robux-no-hack-or-scam_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/watch-ads-for-robux_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/coin-master-free-online_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-sign-in-free_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-2021-november-hacked_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-piano-keyboard-hack_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-robux-no-downloading-and-no-email_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/did-someone-hack-john-doe-roblox_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_off000031ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31AB	22212 bytes
SHA-256: `4f88b8c4ce26aae73040dc02ae3e0acd71e32c6ada691e7e5aad016c9b08457d`
`font_01_sfnt_off000062fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62FB	19204 bytes
SHA-256: `ce738487085ad599441484df9d90a1a143049edc5affa9a85a5d558c4f13480e`

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