PDF malware analysis — malicious · b02d4c071f245412

MALICIOUS

PDF

45.0 KB Created: 2021-05-11 09:01:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 65c937e59a0276e78bf3e7460aa9c776 SHA-1: a5b05ce86b99b6706c94dd347ec025a1fbf77c8b SHA-256: b02d4c071f245412581349972d91d3698bc39fcdfe1d303a969446331bccf0d0

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 0.9632

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 https://netcdn.xyz/app/406889139/free-coin-master-cards-game-hack PDF link annotation
- https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-card-hack_GM406889139.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/114-hacks_GM479516143.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
- https://balibalotour.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.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
`font_00_sfnt_off00004c01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4C01	24680 bytes
SHA-256: `0ebbe7d53fad81f2473b556b6fc978f138c86d1eddfd8dee94eb0a82da2c54e7`
`font_01_sfnt_off00008496.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8496	2920 bytes
SHA-256: `601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7`
`font_02_sfnt_off00008eaf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EAF	17884 bytes
SHA-256: `34dd8c80f69d0f68a5b5993274c8f1bdeef3254478921523cc39dd8566b84a5f`

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