PDF malware analysis — malicious · 312f377cb6645ad7

MALICIOUS

PDF

47.3 KB Created: 2021-05-17 22:20:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: e3bf4dc72c84229956f374206ef50132 SHA-1: aa214321e8d3adfce1e0004965cef20513e2f76a SHA-256: 312f377cb6645ad7be9000310ebbba94c39b4cbfbbe582e41da5146adf9b1aa6

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 0.8948

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.xyz/app/479516143/minecraft-free-download-no-virus-game-hack PDF link annotation
- http://www.eucorro.com/arquivos/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/free-coin-master-s_GM406889139.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/free-robux-earn_GM431946152.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/robux-hack-me_GM431946152.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/roblox-lawsuit_GM431946152.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/free-roblox-templates_GM431946152.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/grab-points-login_GM431946152.pdfIn PDF document text
- http://www.eucorro.com/arquivos/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
- https://youtuIn PDF document text
- https://sigmaclient.info#2In PDF document text
- https://flux.today#3In 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_003_off00004a1a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A1A	29180 bytes
SHA-256: `e5c2219ebe42fdd567dd406644682ffcff4c3273dfffe5a209959fb27897f7d5`
`font_01_sfnt_off00008ba5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8BA5	2856 bytes
SHA-256: `8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44`
`font_02_sfnt_off0000957c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x957C	18564 bytes
SHA-256: `73fda2f7f87cf364c845d3fc1df52f7bb102f180f2e093609ba7690804eae928`

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