PDF malware analysis — malicious · c8dbc5b902e8def0

MALICIOUS

PDF

41.4 KB Created: 2021-05-17 16:37:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 4e318c80ef40a451432245f29f284188 SHA-1: ab6174fa74387c52f26c7c6c80da96815ca95dce SHA-256: c8dbc5b902e8def029e63bdd690c46b748471a1e73e10db19deb92f210de5155

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 0.9971

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 https://netcdn.xyz/app/431946152/hack-robux-game-hack PDF link annotation
- https://www.nordicstar.co.uk/uploads/files/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/gamesofficenet-hack-coin-master_GM406889139.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_off000049d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x49D7	23828 bytes
SHA-256: `fc658f032aa293f8d40bd992c7c8bce6b6a859ec0cdb78cf464a9cf7c6c533b0`
`font_01_sfnt_off00007f4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F4C	18248 bytes
SHA-256: `9805bb7d0eadd4beaac6fd3b5d5d8b6e8e5d33c97ce909732e364f826719e5d2`

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