PDF malware analysis — malicious · f81fcd500d6ed1a8

MALICIOUS

PDF

35.9 KB Created: 2021-07-10 00:51:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: fc4cafbe835cc42cd4d35902ed8d92ef SHA-1: 6074a6ea2c47ce96c455b4dcc422d4f0c2959f0f SHA-256: f81fcd500d6ed1a80ba55577abff5bb9f2a72846d9f9c87c9f2b27883b7d6832

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/free-robux-gift-card-codes-game-hack PDF link annotation
- http://polycraft.ae/uploaded_files/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/how-to-get-free-robux-2021-envix_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/roblox-cheat-engine-scripts-2021_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/como-se-tiene-el-hack-para-traspasar-paredes-en-roblox_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/roblox-account-steal-hack_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/roblox-colouring-in-free-download_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/free-roblox-trump-shirt_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/my-wife-hacked-my-roblox-account-when-i-was-sick_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/how-to-gain-robux-for-free_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/roblox-vip-gamepass-free-script_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-live_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/free-coins_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/roblox-redeem-roblox-card-hack_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_off000032fd.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x32FD	23088 bytes
SHA-256: `4863d39fa39cba4a1adbade884f5fab4254a1fe83c0b171e18597e7e66f48810`
`font_01_sfnt_off000066ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66ED	19112 bytes
SHA-256: `a9b7dd84bf9e82aea66064645c2f0ef7c8831366a8baade96afcbb6aebc803c0`

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