PDF malware analysis — malicious · 0af503c5804bd4bb

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 12:28:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 8a715316e80a75a41166c9bd5bafec5d SHA-1: 4603358ed2647e407b039c8b9cee582abf332978 SHA-256: 0af503c5804bd4bb7976b848b9eea9d7d1cb51db92e2d67e62bc50aab07b36d3

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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-coins-game-hack PDF link annotation
- https://www.knjiznica-oroslavje.hr/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/roblox-cheat-codes-for-dragon-ball-z-rage-2021_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/cheat-engine-roblox-deadzone-remade-hack_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/robux-hack-me_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/egg-farm-roblox-hack_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/roblox-swordburst-online-level-hack_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/coin-master-hack-version-download-2021-android_GM406889139.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_002_off00003286.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3286	23264 bytes
SHA-256: `04d7579d9e4e0b14064d0db6e2133bbc17a5ffe12b7d262260f9dd6cfb6cfb8a`
`font_01_sfnt_off000066f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66F4	18176 bytes
SHA-256: `c90cd52c690b3b1dd04b69356ad4f8db221968fb130a3d2ff71dcd50323a1a90`

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