PDF malware analysis — malicious · 91f71ddc774e69c9

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 00:51:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 4a51b1c26ef27d08a4e1b473031c5781 SHA-1: d93ac19cdacb257bf00d8fe99f549273d3b3203f SHA-256: 91f71ddc774e69c96c3bfda5d44b76e301f558c8bfcc1043b0e21b004434796b

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/479516143/free-minecraft-website-game-hack PDF link annotation
- http://knjiznica-oroslavje.hr/files/get-bucks-free-roblox_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/roblox-mod-apk-unlimited-robux-2021-download-free_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/how-to-inspect-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/hack-for-roblox-ios_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/money-hack-ultimate-driving-roblox_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/ways-hacks-robux_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/free-robux-codes-hack_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/counter-blox-roblox-offensive-cheat_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/free-robux-codes-2021-no-survey_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/free-stuff-catalog-roblox_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- http://knjiznica-oroslavje.hr/files/robux-win_GM431946152.pdfIn PDF document text
- https://www.knjiznica-oroslavje.hr/files/claim-free-spins-coin-master_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
`font_00_sfnt_off00002fe5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FE5	22616 bytes
SHA-256: `ae65b0b0423b205c755c2d699f780c9bac3b5331053198acf02ccfb480aa0c4d`
`font_01_sfnt_off000061a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61A9	18212 bytes
SHA-256: `08e41d3b03130c2060aba57ba7a93c79e063729dc5ffe32466a4c949ad11576a`

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