PDF malware analysis — malicious · 385f38eba3f3630f

MALICIOUS

PDF

44.1 KB Created: 2021-05-17 04:00:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 5cef57b2cb6ae95cc45c0dfbde9422b9 SHA-1: 891080f6432775d61e88e0c4911293e8e464c217 SHA-256: 385f38eba3f3630f383873aa4249752d0db8db7b0ea76c0a1d8d9048bd4290e2

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9969

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.xyz/app/406889139/coin-master-free-cards-hack-game-hack PDF link annotation
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/minecraft-aimbot_GM479516143.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/roblox-rape_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/roblox-hacked-version-download_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
`stream_003_off00004af9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4AF9	27740 bytes
SHA-256: `a3d1020a8f9b1ca9b94bf881565ea2dd8b19d18c44a5122fe8e2c8b8f453bf67`
`font_01_sfnt_off00008ac4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AC4	18056 bytes
SHA-256: `ad4f2d10031887feff52537d65cf9a04719575ebe7be64232d8e0b4f73fdfdc1`

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