PDF malware analysis — malicious · b2585df5fa0ea0c6

MALICIOUS

PDF

33.4 KB Created: 2021-06-29 05:51:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: c29adfa86dea8e983861b08ef02c4905 SHA-1: 183197f7b5bc6bfae49947b1df6b8b5dc6fbb7a1 SHA-256: b2585df5fa0ea0c611229bc7981ff487bfc077bd2b35abcca38b20daa85ca05d

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9980

Heuristics 5

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.
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.co/app/431946152/roblox-bag-free-game-hack PDF link annotation
- https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-by-playing-games_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/minecraft-free_GM479516143.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/free-and-easy-robux_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/free-roblox-scibt-pack-exploit-2021_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/robux-hack-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-exe_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/roblox-cheat-engine-64-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/how-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/walking-through-hack-roblox-v8_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/roblox-korblox-deathspeaker-free_GM431946152.pdfIn PDF document text
- https://lamgiangservice.com/ckfinder/userfiles/files/free-dat-boi-shirt-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_off00002d84.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2D84	22224 bytes
SHA-256: `fd76b34823b5cd0d5772b043e14b73c322f01c18d5b80b84501f15b20264ecd9`
`font_01_sfnt_off00005eaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EAA	18652 bytes
SHA-256: `0df5eb0be3bd645f7423d64746880f1b4a4c83b57711c3b326ca1e662ba58f32`

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