PDF malware analysis — malicious · 1bb95fc65e426416

MALICIOUS

PDF

35.4 KB Created: 2021-07-08 11:17:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: de63e843e1eb800fd3a190c6d39b5133 SHA-1: 7da07420fbb3e98029e3d5b056b62c9c224899e1 SHA-256: 1bb95fc65e426416077e23336f326e09422d26301eb18967cdd1dc6de0e5c9c8

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/431946152/robux-free-gift-card-org-hack-game-hack PDF link annotation
- https://www.stylafik.in/uploaded_files/userfiles/files/rbxboost-earn-free-roblox-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/you-want-free-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-codes-site_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/hack-roblox-account-2021_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/minecraft-free-app_GM479516143.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/hack-icebreak-roblox_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-hack-roblox-infinite-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/roblox-free-avatar-editor_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-coin-master-gift-link_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_off0000328f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x328F	22476 bytes
SHA-256: `e24ba27a341bd0f43f89f2484fe658e137206a62fdc2051c1fe81714d378a44f`
`font_01_sfnt_off000064ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64AC	19284 bytes
SHA-256: `f1156f7356268fb459af4e8b8e1a15365edbfdc259dc3c2b8efbc825fbef6ec1`

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