PDF malware analysis — malicious · 374f154cd15007d8

MALICIOUS

PDF

48.7 KB Created: 2021-06-09 05:42:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: ddc22b501e6213c96a76a2c512536899 SHA-1: e7ba1568cb7387bd8ba55571a8f66020a66d0767 SHA-256: 374f154cd15007d80e1fd0ef1fa6a54651db1b9bbcc0e7b7d25a7e49c113e523

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 0.9796

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 https://netcdn.tw/app/431946152/haw-to-get-free-dominus-on-roblox-a-week-ago-game-hack PDF link annotation
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/toolbox-mod_GM479516143.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-exploit-injector-roblox_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/hack-minecraft_GM479516143.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/master-coin-free-link_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/usar-hacks-en-roblox_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-roblox-website_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/robux-generator-that-works_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
- https://krnl.rocksIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000552a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x552A	24852 bytes
SHA-256: `e59aae913f83d2465a315527301b151411b85a6a029796e87a2f34ddb35c1381`
`font_01_sfnt_off00008d75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D75	2824 bytes
SHA-256: `94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4`
`font_02_sfnt_off00009723.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9723	19788 bytes
SHA-256: `acaf425552323465e39582da940164b3f8b4e1484f6685b733ac5aee9324a2d5`

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