PDF malware analysis — malicious · c3d348d60f1e69f5

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 07:51:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 1ce63d0b0cd9e03187de12542b1b0b17 SHA-1: de695f038fa00f2736144b30697392796a643f3f SHA-256: c3d348d60f1e69f5523a4b67a1121064f98ad3fa9c015a2acd9d0e77602d2c06

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a LOLBin command-execution lure. 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 5

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.
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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/free-minecraft-packs-game-hack PDF link annotation
- https://www.yantan.com.tw/upload/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/cmd-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn macro / runtime command snippet
- https://www.yantan.com.tw/upload/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/nopde-engine-roblox-hacks_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-free-spins-daily_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/alone-battle-roytale-roblox-hacks_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/i-want-free-robux_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-to-play-heroes-online-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/nintendo-switch-roblox-free_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-hack-pastebin_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/cheat-engine-hack-roblox-rpg_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upIn macro / runtime command snippet
- 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_off000033b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33B8	22708 bytes
SHA-256: `32e4bb6fc8e7c1be491c864ccc98d13f14b3e1d9f69135885db38fcc4358d4d6`
`font_01_sfnt_off0000668f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x668F	18180 bytes
SHA-256: `cd26da6d7e7da25a67fce542645decc56f078d6b90bb5ba2dacc5a3e21e5a79e`

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