PDF malware analysis — malicious · 157641aa6e284891

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 19:33:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: f940b22e5671ef28d62c1321cd514541 SHA-1: 80134edbb31d85796352c625ebefbb0b69322a4b SHA-256: 157641aa6e284891bbe55cd45db314ed978cb6da63ed650c69a93f84c7f00b7d

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/roblox-robux-hack-game-hack PDF link annotation
- https://vieclamjapan.com/upload/files/oprewards-robux_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-roblox-acc_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-vip-roblox_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-robux-and-tix-button-game_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/optifine-pe_GM479516143.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/how-to-get-free-robux-east-on-anithing_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/roblox-anniversary-free-card_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-robux-100-percent-real_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/free-way-to-get-p-in-plaza-game-on-roblox_GM431946152.pdfIn PDF document text
- https://vieclamjapan.com/upload/files/va-a-ser-hackeado-roblox-en-2021_GM431946152.pdfIn PDF document text
- https://www.roblox.com/.IIn 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_off00003079.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3079	22724 bytes
SHA-256: `f0cc222dffc3366beb1e66c96bec398a2075c7575e469d663ecb0b7144ebbf69`
`font_01_sfnt_off00006332.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6332	18796 bytes
SHA-256: `ac85a7f36e8d2c6b778aa8e0527eba638abc788d16e2325ecdb460050b0ba6ed`

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