PDF malware analysis — malicious · 13b2c046add53c35

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 09:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 51b30a19be8f2f3385a87c89fc4780f6 SHA-1: d4c9e5fbd9b1b137f503d620b175cd11147d7800 SHA-256: 13b2c046add53c35c8e9466fad3ac673515213562bf77fe9661f3a8a95a6ec9c

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/479516143/minecraft-free-ios-2021-game-hack PDF link annotation
- https://www.yantan.com.tw/upload/files/pet-sim-online-hack-download-roblox_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-to-hack-a-roblox-account-easy-2021_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/t-shirt-in-roblox-free_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/minecraft-is-free-roblox_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/application-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/free-robux-tutorial_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-swordburst-online-level-hack_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-walk-through-walls-hack-no-cheat-engine_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-rewards-site_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/free-google-roblox-items_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
`font_00_sfnt_off0000332f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x332F	21912 bytes
SHA-256: `47b772f228c0cf99f1c7f0cdf484dc62ea5304a2a90fc6cbb9dfbe91e4b8f377`
`font_01_sfnt_off0000637b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x637B	18400 bytes
SHA-256: `2bf844231399acc5cf711acb9faf8aedd609a9c8605d8b3f0076c20fc980fe80`

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