PDF malware analysis — malicious · 4bc0d2aeb45f43ac

MALICIOUS

PDF

45.2 KB Created: 2021-04-28 23:08:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 5e3e8e2e53c126456e69302eb67256f2 SHA-1: 326a312b5e9ba0e1b34287abc54d0ebd97a8eb23 SHA-256: 4bc0d2aeb45f43ac4987775b72d6ac8aeca7b95da6ca6dc7044c94b7b26f92f1

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded URLs and heuristics indicating a brand-impersonation credential phishing lure, specifically impersonating Facebook to trick users into downloading a malicious file. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-scp-foundation-model-free-game-hack, which is presented as a 'free game hack'. The document body, though heavily corrupted, contains references to this URL and appears to be a lure for downloading potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9853

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/roblox-scp-foundation-model-free-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/roblox-scp-foundation-model-free-game-hack PDF link annotation
- https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-money-hack-cheat-engine-63.pdfIn PDF document text
- https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-noclip-no-cheat-engine.pdfIn PDF document text
- https://www.bolsoshf.com/ckfinder/userfiles/files/free-gamepass-roblox-script-not-patched.pdfIn PDF document text
- https://www.bolsoshf.com/ckfinder/userfiles/files/free-cookie-codes-for-roblox.pdfIn PDF document text
- https://www.bolsoshf.com/ckfinder/userfiles/files/hack-roblox-reddit.pdfIn PDF document text
- https://www.bolsoshf.com/ckfinder/userfiles/files/boku-no-roblox-remastered-hack-chose-quirks.pdfIn PDF document text
- https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-shirt-template-free.pdfIn PDF document text
- https://www.bolsoshf.com/ckfinder/userfiles/files/uirbx-club-free-robux.pdfIn PDF document text
- https://www.bolsoshf.com/ckfinder/userfiles/files/how-to-make-a-free-robux-hack.pdfIn PDF document text
- https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-walk-through-walls-cheat-engine-jailbreak.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004379.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4379	25668 bytes
SHA-256: `c153ca62384da056fb4b58bf789075d07391863c0d9aa09b4ee1a087f7bbbbca`
`font_01_sfnt_off00007f67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F67	3948 bytes
SHA-256: `4c836a6246321303d10fca719808d35220b906ca76bbb44946cc04297e9ce808`
`font_02_sfnt_off00008c5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C5F	19088 bytes
SHA-256: `a5516a121f5f418872b6b1d4a1c6b1ae5a37dd15650276c256fe523d10ff48e8`

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