PDF malware analysis — malicious · 82f878d64dbb3cdd

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 06:59:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: a722836fad1dc1cf63866755829f89c5 SHA-1: 66dd43a6d782b102e2566557ccef0139d7520f5a SHA-256: 82f878d64dbb3cdd3752fc60e7333522e413ce115942b37dcc9777521636e686

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/free-spin-coin-master-2021-game-hack PDF link annotation
- http://www.valenciamaids.com/userfiles/files/websites-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-murder-mystery-2-script-hack_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-apocalypse-rising-speed-hack-2021_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/pubg-uc-telegram_GM1330123889.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-cheat-flying_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/cheat-roblox-building-simulator_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/real-coin-master-hacks_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-roblox-injectors-list_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/hack-roblox-players_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_002_off000031bd.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31BD	22104 bytes
SHA-256: `057ccc5c5f0fc7188a1c52fdb9d1377073a293016b1fcc92fd6b4d9491484561`
`font_01_sfnt_off000062b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62B2	18576 bytes
SHA-256: `3af2a790f1bd7a3afb398ecfc348a5559e4db05f514a45e9361d5c46150add68`

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