PDF malware analysis — malicious · 28221c871801effb

MALICIOUS

PDF

43.9 KB Created: 2021-05-15 05:36:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 5c6527eac620b0c296c2016d2326f2b2 SHA-1: cc220ef348c37f6d5416e95435904b3435c0c880 SHA-256: 28221c871801effb527ef97055a8d92274385504e99461a7b707fbd95e90bed1

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains heuristics indicating brand impersonation (Amazon) and a call-to-action for downloading a file, disguised as an offer for 'free Robux'. The embedded URL leads to a domain unrelated to the impersonated brand, strongly suggesting a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and embedded URLs point to a malicious intent to trick users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 4

Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/rbx-free-robux-game-hack.
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/rbx-free-robux-game-hack PDF link annotation
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-no-email_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-skin-free_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/wurst-client-download_GM479516143.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/earn-robux-today_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
- https://redaksi9.com/new/public/ckfinder/userfiles/files/get-free-robux-info_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_off0000500d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x500D	25500 bytes
SHA-256: `812c87efeab24733f5d233ee30706a6519b4168ce9705d8e5916c6e279945cfb`
`font_01_sfnt_off00008a62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A62	18012 bytes
SHA-256: `03f7603bc8a5695bbd0c39958af3fcfd5a932cbc13eba7563a8e8ca8b5ca4208`

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