PDF malware analysis — malicious · 1c3a8bb4e90c3ae4

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 03:28:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: e45a8f9211e311a24e87ba86dd577a15 SHA-1: 6cc4d78e7dd62af8dd25f4dbc3ed77d1a53f01cc SHA-256: 1c3a8bb4e90c3ae48b4bf7c994dab4aadfa7de2e669e6413912c83bc8c9251d0

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-coin-master-account-game-hack PDF link annotation
- http://polycraft.ae/uploaded_files/userfiles/files/free-gift-cards-roblox-2021_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/roblox-phantom-forces-credits-hack-2021_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/how-to-get-free-clothes-no-robux-of-freinds_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/hacked-appbounty-roblox_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/minecraft-on-computer-free_GM479516143.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/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/how-to-get-free-robux-download_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/free-funny-roblox-avtras_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- http://polycraft.ae/uploaded_files/userfiles/files/free-robux-quis_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_off000033d7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x33D7	23664 bytes
SHA-256: `77973f6b5dd42e3f8032df2056ab3523a456e4ed44dd555801dda3a16fa0c475`
`font_01_sfnt_off000069da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x69DA	18140 bytes
SHA-256: `ca77f048189f6b42c4087a98757a7b7ee8d42f0b46b1d7450a305d57abf2558b`

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