PDF malware analysis — malicious · 166de1b87d1d6c60

MALICIOUS

PDF

34.9 KB Created: 2021-06-20 05:08:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: ef3525aacf01b5c91d114c63c695853b SHA-1: 96dcc601df65c39381640cad79f5e5cae4f4436e SHA-256: 166de1b87d1d6c6054687ecc86b7952d2a2d9f459c18d0d797486eeb7d271f1c

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external resources, many of which are SEO-optimized PDFs related to game hacks and cheats for popular games like Roblox and Coin Master. The primary URL, http://netcdn.co/app/431946152/free-roblox-account-generator-old-accounts-game-hack, suggests a lure for potentially unwanted or malicious software. The heuristic findings indicate a link farm and a high ML classification score, supporting the malicious verdict.

Machine Learning

Nyx PDF Classifier malicious score 0.9984

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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-roblox-account-generator-old-accounts-game-hack PDF link annotation
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/hack-para-canbiare-el-nombre-en-roblox_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-get-free-shirts-on-roblox-no-hacks_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/comment-hack-roblox-prison-life-2021_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/pubg-uc-zip_GM1330123889.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/ldshadowlady-roblox-someone-hacked-my-acount_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/counter-blox-roblox-offensive-hack-script_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/download-roblox-cheat-tool_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_off000030ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30FF	22436 bytes
SHA-256: `9b0408b588d03809367e9195f305add9c0aa1207ed24dce3bb4ce81bc755a1f2`
`font_01_sfnt_off0000631a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x631A	19068 bytes
SHA-256: `25a9fad87c6900432857f214adac6836d4e8c5ec64371b5a457d4eaa8081b984`

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