PDF malware analysis — malicious · cc8b4e78fd29fa15

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 04:50:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 47502ec3534e21e694b97c7717eaeb31 SHA-1: 54d9382f6b1cefed38ae48c65448fa21cd91b383 SHA-256: cc8b4e78fd29fa1580504804c2853f2f88f20e9975c74e08afa4873bb382258c

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains lures for free game accounts and hacks, directing users to external URLs. It also hosts a large number of other PDF files, suggesting a link farm or SEO manipulation tactic. The ML classifier flagged this PDF with high confidence, and the presence of external links indicates a potential for further malicious activity or redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/free-roblox-accounts-game-hack PDF link annotation
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/roblox-free-robux-no-download_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/how-can-i-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/hack-for-marvel--dc-dawn-of-heroes-roblox_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/was-roblox-hacked-once_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/roblox-gift-cards-codes-free_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/free-robux-no-human-verification-website_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/free-robux-hack-us-2021_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/pokemon-go-free-account-username-and-password_GM1094591345.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/roblox-cp_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/free-pin-numbers-roblox-gift-cards_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/free-roblox-card-reedemm-code_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/robux-earning-sites_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/gametest-roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/roblox-robux-genarator-no-hack-2021_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/hack-exploit-roblox_GM431946152.pdfIn PDF document text
- https://www.shopinkart.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-as-a-kid_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_off00002cf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2CF3	22788 bytes
SHA-256: `f825dfdf3a734908f4bf4067ab3e3f727637e1469fcf25f8669ce3b47d0b6486`
`font_01_sfnt_off00005fc3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FC3	18896 bytes
SHA-256: `dca2f27ecdd8c5a39a81753fb954dd30ae74f07dc947ace6cc80d7c98cb68ba8`

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