PDF malware analysis — malicious · c19bdae7e23033e6

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 07:38:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: b550fd441976bdfac6615c5e15f80494 SHA-1: 4a464dd0275c6bb9a8ae7b38c13997843cc09d0b SHA-256: c19bdae7e23033e69c6e3e1b2228cc3b99855a54bb84183395f71556884625cb

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure for a 'Coin Master Hack 2021' and links to a URL that is likely to host malicious content or redirect to a phishing page. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the PDF structure and embedded URI strongly suggest a social engineering attack aimed at driving traffic to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/coin-master-hack-2021-android-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/rbx-free_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
- https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_004_off0000531c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x531C	28120 bytes
SHA-256: `aec66a79fe61e822df6cd084c2ffdf16981f56f6e9e95f0d8e11bc350489b0e3`
`font_01_sfnt_off00009428.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9428	2920 bytes
SHA-256: `601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7`
`font_02_sfnt_off00009e41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E41	18292 bytes
SHA-256: `27f4b60df4c5b9b58df513bbeae6e0a7300ac945a9a466f89e8a511806a668c2`

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