PDF malware analysis — malicious · 8b6b505ea88a3b5a

MALICIOUS

PDF

47.6 KB Created: 2021-05-14 08:02:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 3f147f24485c50bb3d1931af035f6d15 SHA-1: a997a2d0bc7c1f115d348a97f0f12686f18a8596 SHA-256: 8b6b505ea88a3b5a56da458fe7bed8f47de02b7cc4d4ebb74fd0c4700a02b025

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 0.9013

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/479516143/minecraft-free-no-virus-game-hack PDF link annotation
- https://www.simplenepaltravel.com/userfiles/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-roblox-intros_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://education.minecraftIn PDF document text
- https://sigmaclient.info#2In PDF document text
- https://flux.today#3In 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_003_off00004cf1.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4CF1	31840 bytes
SHA-256: `4ecb8d2e481fd48ada54cd1f42a8a4caa03d4c349f358a9027e2a79c0babb681`
`font_01_sfnt_off00008ef0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EF0	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off000098a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98A2	17984 bytes
SHA-256: `dc1070e55d23b1f9b68bc4df5483709f88991ded958cde4b28c75d043bb6694a`

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