PDF malware analysis — malicious · 0a7adf3bf68c97dc

MALICIOUS

PDF

36.0 KB Created: 2021-07-03 12:11:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 6923fe7af5c6b69f842631f697623721 SHA-1: b72c69f2eac43a8723109b54e5e00b82bf8354cd SHA-256: 0a7adf3bf68c97dcc38808f2a4be664f4d24209d1aaf1c1f6e524c81066f0b45

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-2021-no-human-verification-game-hack PDF link annotation
- https://www.tw-storage.com.tw/upload/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-events-2021-robux-free_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-do-you-get-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-to-hack-roblox-on-ipad-2021_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/robux-free-2021-com_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/unlimited-robux-hack-add_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/aimbot-hack-roblox-cbro_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-skina-free-copy-paste_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/hacked-roblox-client_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/dog-roblox-free-costume-make_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-2021-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/video-de-roblox-hack-robux-2021_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-jailbreak-robux-hack_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-to-hack-a-minecraft-server_GM479516143.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
`font_00_sfnt_off000031ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31CA	22988 bytes
SHA-256: `a59ca81d3f94d717fd87613c6e5a6f393688fd65cd1b1ddd1c6a00d352efe8ed`
`font_01_sfnt_off000065d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65D0	19736 bytes
SHA-256: `415a8643b263bdb8a5e4ae51f1e0119ae52f9187a77a7c28158d674e6dc65c25`

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